Insert query check if record exists - If not, Insert it
You can use below query. Here it will insert the ip_address when it is not present in your table.
INSERT INTO ip_list (ip_addr)
SELECT * FROM (SELECT '192.168.100.1') AS tmp
WHERE NOT EXISTS (
SELECT ip_addr FROM ip_list WHERE ip_addr='192.168.100.1'
);
MySQL: Insert record if not exists in table
I'm not actually suggesting that you do this, as the UNIQUE index as suggested by Piskvor and others is a far better way to do it, but you can actually do what you were attempting:
CREATE TABLE `table_listnames` (
`id` int(11) NOT NULL auto_increment,
`name` varchar(255) NOT NULL,
`address` varchar(255) NOT NULL,
`tele` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
Insert a record:
INSERT INTO table_listnames (name, address, tele)
SELECT * FROM (SELECT 'Rupert', 'Somewhere', '022') AS tmp
WHERE NOT EXISTS (
SELECT name FROM table_listnames WHERE name = 'Rupert'
) LIMIT 1;Query OK, 1 row affected (0.00 sec)
Records: 1 Duplicates: 0 Warnings: 0
SELECT * FROM `table_listnames`;
+----+--------+-----------+------+
| id | name | address | tele |
+----+--------+-----------+------+
| 1 | Rupert | Somewhere | 022 |
+----+--------+-----------+------+
Try to insert the same record again:
INSERT INTO table_listnames (name, address, tele)
SELECT * FROM (SELECT 'Rupert', 'Somewhere', '022') AS tmp
WHERE NOT EXISTS (
SELECT name FROM table_listnames WHERE name = 'Rupert'
) LIMIT 1;Query OK, 0 rows affected (0.00 sec)
Records: 0 Duplicates: 0 Warnings: 0
+----+--------+-----------+------+
| id | name | address | tele |
+----+--------+-----------+------+
| 1 | Rupert | Somewhere | 022 |
+----+--------+-----------+------+
Insert a different record:
INSERT INTO table_listnames (name, address, tele)
SELECT * FROM (SELECT 'John', 'Doe', '022') AS tmp
WHERE NOT EXISTS (
SELECT name FROM table_listnames WHERE name = 'John'
) LIMIT 1;Query OK, 1 row affected (0.00 sec)
Records: 1 Duplicates: 0 Warnings: 0
SELECT * FROM `table_listnames`;
+----+--------+-----------+------+
| id | name | address | tele |
+----+--------+-----------+------+
| 1 | Rupert | Somewhere | 022 |
| 2 | John | Doe | 022 |
+----+--------+-----------+------+
And so on...
Update:
To prevent #1060 - Duplicate column name error in case two values may equal, you must name the columns of the inner SELECT:
INSERT INTO table_listnames (name, address, tele)
SELECT * FROM (SELECT 'Unknown' AS name, 'Unknown' AS address, '022' AS tele) AS tmp
WHERE NOT EXISTS (
SELECT name FROM table_listnames WHERE name = 'Rupert'
) LIMIT 1;Query OK, 1 row affected (0.00 sec)
Records: 1 Duplicates: 0 Warnings: 0
SELECT * FROM `table_listnames`;
+----+---------+-----------+------+
| id | name | address | tele |
+----+---------+-----------+------+
| 1 | Rupert | Somewhere | 022 |
| 2 | John | Doe | 022 |
| 3 | Unknown | Unknown | 022 |
+----+---------+-----------+------+
Check if record exists then insert new row in database table?
I don't know/work-with coldfusion so not sure I'm reading the logic correctly ...
- if record does not exist in
table1but - record does exit in
contactthen - insert a row into
inter_work_tbl
The general T-SQL query would look like (note: mixing T-SQL with references to the coldfusion variables):
insert into inter_work_tbl (user_id
,first_name
,last_name
,password)
select '#session.user_id#',
c.fname,
c.lname,
'#password#'
from contact c
where c.userid = #session.user_id#
and not exists(select 1
from table1 t
where t.user_id = c.userid)
SQL Server Insert if not exists
instead of below Code
BEGIN
INSERT INTO EmailsRecebidos (De, Assunto, Data)
VALUES (@_DE, @_ASSUNTO, @_DATA)
WHERE NOT EXISTS ( SELECT * FROM EmailsRecebidos
WHERE De = @_DE
AND Assunto = @_ASSUNTO
AND Data = @_DATA);
END
replace with
BEGIN
IF NOT EXISTS (SELECT * FROM EmailsRecebidos
WHERE De = @_DE
AND Assunto = @_ASSUNTO
AND Data = @_DATA)
BEGIN
INSERT INTO EmailsRecebidos (De, Assunto, Data)
VALUES (@_DE, @_ASSUNTO, @_DATA)
END
END
Updated : (thanks to @Marc Durdin for pointing)
Note that under high load, this will still sometimes fail, because a second connection can pass the IF NOT EXISTS test before the first connection executes the INSERT, i.e. a race condition. See stackoverflow.com/a/3791506/1836776 for a good answer on why even wrapping in a transaction doesn't solve this.
How can I do 'insert if not exists' in MySQL?
Use INSERT IGNORE INTO table.
There's also INSERT … ON DUPLICATE KEY UPDATE syntax, and you can find explanations in 13.2.6.2 INSERT ... ON DUPLICATE KEY UPDATE Statement.
Post from bogdan.org.ua according to Google's webcache:
18th October 2007
To start: as of the latest MySQL, syntax presented in the title is not
possible. But there are several very easy ways to accomplish what is
expected using existing functionality.There are 3 possible solutions: using INSERT IGNORE, REPLACE, or
INSERT … ON DUPLICATE KEY UPDATE.Imagine we have a table:
CREATE TABLE `transcripts` (
`ensembl_transcript_id` varchar(20) NOT NULL,
`transcript_chrom_start` int(10) unsigned NOT NULL,
`transcript_chrom_end` int(10) unsigned NOT NULL,
PRIMARY KEY (`ensembl_transcript_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;Now imagine that we have an automatic pipeline importing transcripts
meta-data from Ensembl, and that due to various reasons the pipeline
might be broken at any step of execution. Thus, we need to ensure two
things:
- repeated executions of the pipeline will not destroy our
> database
- repeated executions will not die due to ‘duplicate
> primary key’ errors.Method 1: using REPLACE
It’s very simple:
REPLACE INTO `transcripts`
SET `ensembl_transcript_id` = 'ENSORGT00000000001',
`transcript_chrom_start` = 12345,
`transcript_chrom_end` = 12678;If the record exists, it will be overwritten; if it does not yet
exist, it will be created. However, using this method isn’t efficient
for our case: we do not need to overwrite existing records, it’s fine
just to skip them.Method 2: using INSERT IGNORE Also very simple:
INSERT IGNORE INTO `transcripts`
SET `ensembl_transcript_id` = 'ENSORGT00000000001',
`transcript_chrom_start` = 12345,
`transcript_chrom_end` = 12678;Here, if the ‘ensembl_transcript_id’ is already present in the
database, it will be silently skipped (ignored). (To be more precise,
here’s a quote from MySQL reference manual: “If you use the IGNORE
keyword, errors that occur while executing the INSERT statement are
treated as warnings instead. For example, without IGNORE, a row that
duplicates an existing UNIQUE index or PRIMARY KEY value in the table
causes a duplicate-key error and the statement is aborted.”.) If the
record doesn’t yet exist, it will be created.(Video) SQL Server stored procedure if exists update else insert exampleThis second method has several potential weaknesses, including
non-abortion of the query in case any other problem occurs (see the
manual). Thus it should be used if previously tested without the
IGNORE keyword.Method 3: using INSERT … ON DUPLICATE KEY UPDATE:
Third option is to use
INSERT … ON DUPLICATE KEY UPDATE
syntax, and in the UPDATE part just do nothing do some meaningless
(empty) operation, like calculating 0+0 (Geoffray suggests doing the
id=id assignment for the MySQL optimization engine to ignore this
operation). Advantage of this method is that it only ignores duplicate
key events, and still aborts on other errors.As a final notice: this post was inspired by Xaprb. I’d also advise to
consult his other post on writing flexible SQL queries.
SQL check if non-unique record exists—If it does, UPDATE; if not, INSERT the record INTO the table
Because I could not add a unique index/constraint on (post_id, meta_key) (because my database happened to already have duplicate post_id/meta_key rows), here's what ended up working for me.
Hopefully this helps someone in the future, let me know if there's any problems with the solution:
REPLACE INTO wp_postmeta (meta_id, post_id, meta_key, meta_value)
SELECT
IFNULL(
(SELECT n.meta_id FROM wp_postmeta n
WHERE n.meta_key = '_new_column_name'
AND n.post_id = o.post_id ),
NULL
),
o.post_id, '_new_column_name', o.meta_value
FROM wp_postmeta o
WHERE meta_key = '_old_column_name';
If record exists dont insert
You need to change your query a bit, but you can use MySql's DUAL keyword to do this:
string _connStr = @"Data Source = EJQ7FRN; Initial Catalog = BES; Integrated Security = True";
string _query = "INSERT INTO [BES_S] (ISN,Titel,Name) ";
_query = _query + " SELECT @ISN, @Titel, @Name FROM DUAL";
_query = _query + " WHERE NOT EXISTS (SELECT ISN WHERE ISN=@ISN)";using (SqlConnection conn = new SqlConnection(_connStr))
{
using (SqlCommand comm = new SqlCommand())
{
comm.Connection = conn;
comm.CommandType = CommandType.Text;
comm.CommandText = _query;
comm.Parameters.AddWithValue("@ISN", txtISN.Text);
comm.Parameters.AddWithValue("@Titel",txtTitel.Text);
comm.Parameters.AddWithValue("@Name", txtName.Text);
try
{
conn.Open();
comm.ExecuteNonQuery();
}
catch (SqlException ex)
{
}
}
}
DUAL is like a dummy table that you can use to SELECT from.
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FAQs
How to find out if a record already exists in a database if it doesn t insert a new record in SQL? ›
First, we check if the record exists with the EXISTS keyword. EXISTS executes the query we tell it to (the SELECT ) and returns a boolean value. If it finds the record, we return 'This record already exists!'
How do you check record is inserted or not in SQL? ›You can check the @@ROWCOUNT right after insert. If it's more than 0, then the insert succeeded. Also, if @@ERROR = 0 after insert, it was successful. No, check it in T-SQL although if the insert will result in error, most likely the error will be propagated into the client.
How to check if row exists before inserting in MySQL? ›To test whether a row exists in a MySQL table or not, use exists condition. The exists condition can be used with subquery. It returns true when row exists in the table, otherwise false is returned. True is represented in the form of 1 and false is represented as 0.
What is the method used to identify if a record is existing or not? ›The exists() method is a query builder method that checks for the existence of a record in a database table. Instead of counting how many copies of a certain record exist, we can directly check for the existence using the exists() method.
How do you find records which are not present in another table? ›Query 1 to find missing rows: MINUS Set Operator
We can use MINUS and easily find out which rows are in table TAB1 that are not in table TAB2. The 1st SELECT should be from TAB1 as that is the query MINUS keeps any rows from not found in the 2nd SELECT .
If you want the query to return only unique rows, use the keyword DISTINCT after SELECT . DISTINCT can be used to fetch unique rows from one or more columns. You need to list the columns after the DISTINCT keyword.
How do you insert dummy records in SQL? ›- begin tran.
- declare @id int.
- set @id = ((select max(id) from table) + 1)
- while (@id <= 1002261)
- begin.
- begin.
- insert into.
- table (id, country)
If you are AUTO_INCREMENT with column, then you can use last_insert_id() method. This method gets the ID of the last inserted record in MySQL. Insert some records in the table using insert command.
Which query is used to insert record? ›The INSERT INTO statement is used to insert new records in a table.
How do you check not exists in SQL? ›NOT EXISTS is used with a subquery in the WHERE clause to check if the result of the subquery returns TRUE or FALSE. The Boolean value is then used to narrow down the rows from the outer select statement.
How to check records in MySQL? ›
The first command you will need to use is the SELECT FROM MySQL statement that has the following syntax: SELECT * FROM table_name; This is a basic MySQL query which will tell the script to select all the records from the table_name table.
What is the difference between in and exists in SQL? ›“IN” clause is preferred when there is a small list of static values or the inner query returns a very less number of rows. “EXISTS” clause is preferred when there is a need to check the existence of values in another table or when there is a need to check against more than one column.
What is the difference between in and exists? ›The main difference between them is that IN selects a list of matching values, whereas EXISTS returns the Boolean value TRUE or FALSE.
How do you identify records in a database? ›- Open the table or form, and then click the field that you want to search.
- On the Home tab, in the Find group, click Find, or press CTRL+F. ...
- In the Find What box, type the value for which you want to search.
The EXISTS operator is used to test for the existence of any record in a subquery. The EXISTS operator returns TRUE if the subquery returns one or more records.
How do you search for a value in a table when you don't have the exact value to search for? ›How do you search for a value in a database table when you don't have the exact value to search for? In such cases, the LIKE condition operator is used to select rows that match a character pattern. This is also called 'wildcard' search.
How can I get non matching records from two tables in SQL? ›- ( SELECT id FROM orders1 EXCEPT SELECT id FROM orders2 ) UNION ( SELECT id FROM orders2 EXCEPT SELECT id FROM orders1 )
- SELECT id FROM ( SELECT DISTINCT id FROM orders1 UNION ALL SELECT DISTINCT id FROM orders2 ) AS temp_tbl GROUP BY id HAVING COUNT(*) = 1.
Using the GROUP BY and HAVING clauses we can show the duplicates in table data. The GROUP BY statement in SQL is used to arrange identical data into groups with the help of some functions. i.e if a particular column has the same values in different rows then it will arrange these rows in a group.
What is a common way in SQL to identify duplicate records? ›You can find duplicates by grouping rows, using the COUNT aggregate function, and specifying a HAVING clause with which to filter rows.
What is dummy in SQL? ›The DUMMY table is provided as a table that always has exactly one row. This can be useful for extracting information from the database, as in the following example that gets the current user ID and the current date from the database. SELECT USER, today(*) FROM SYS.DUMMY. The DUMMY table is a SQL Anywhere system table.
How to insert random values in table in SQL? ›
SQL RAND() example
SELECT RAND(); SELECT RAND(5); As you can see, in the first example, the RAND() function generates a random number in decimals between 0 to 1. Each time you execute the statement, it returns different random values.
If you want to add data to your SQL table, then you can use the INSERT statement. Here is the basic syntax for adding rows to your SQL table: INSERT INTO table_name (column1, column2, column3,etc) VALUES (value1, value2, value3, etc); The second line of code is where you will add the values for the rows.
How do I find the last inserted identity value? ›Use @@IDENTITY to Return the Last-Inserted Identity Value in SQL Server. In SQL Server, you can use the T-SQL @@IDENTITY system function to return the last-inserted identity value in the current session. Note that it returns the last identity value generated in any table in the current session.
How to use LAST_INSERT_ID ()? ›You can also use LAST_INSERT_ID() to delete the last inserted row: DELETE FROM product WHERE id = LAST_INSERT_ID(); If no rows were successfully inserted, LAST_INSERT_ID() returns 0. The value of LAST_INSERT_ID() will be consistent across all versions if all rows in the INSERT or UPDATE statement were successful.
How to get last inserted record from table in SQL Server? ›There is no way to ask SQL Server which row was inserted last unless you are doing so in the same batch as the insert. For example, if your table has an IDENTITY column, you can use SCOPE_IDENTITY() (never use @@IDENTITY , since that can be unreliable if you have or will ever add triggers to the source table):
How do you create a insert query? ›There are two basic syntax of INSERT INTO statement is as follows: INSERT INTO TABLE_NAME (column1, column2, column3,... columnN)] VALUES (value1, value2, value3,... valueN);
What does insert query return? ›An SQL INSERT statement writes new rows of data into a table. If the INSERT activity is successful, it returns the number of rows inserted into the table.
What is the purpose of insert query? ›The INSERT statement in SQL is used to add new data to your database.
Is not null or exists SQL? ›The IS NOT NULL condition is used in SQL to test for a non-NULL value. It returns TRUE if a non-NULL value is found, otherwise it returns FALSE. It can be used in a SELECT, INSERT, UPDATE, or DELETE statement.
Is exists query in SQL? ›The EXISTS condition in SQL is used to check whether the result of a correlated nested query is empty (contains no tuples) or not. The result of EXISTS is a boolean value True or False. It can be used in a SELECT, UPDATE, INSERT or DELETE statement.
What is the alternative of not in in SQL? ›
If so, you should consider using a NOT EXISTS operator instead of NOT IN, or recast the statement as a left outer join. A recommendation to prefer use of [NOT] EXISTS over [NOT] IN is included as a code analysis rule in SQL Prompt (PE019).
Can we write SQL query in if condition? ›IF statements can be used to conditionally enter into some logic based on the status of a condition being satisfied. The IF statement is logically equivalent to a CASE statements with a searched-case-statement-when clause.
How do you write an if statement in a query? ›The IF() function that can be used in queries is primarily meant to be used in the SELECT portion of the query for selecting different data based on certain conditions, not so much to be used in the WHERE portion of the query: SELECT IF(JQ.
How do you write an IF condition? ›An if statement is written with the if keyword, followed by a condition in parentheses, with the code to be executed in between curly brackets. In short, it can be written as if () {} .
How do I find records in SQL database? ›Search object in all online SQL databases
On the home page of the object explorer, enter the object name and search. In the result below, you see that a specified object exists in multiple databases. You can browse to the specified object in the database using the object explorer.
To select rows using selection symbols for character or graphic data, use the LIKE keyword in a WHERE clause, and the underscore and percent sign as selection symbols. You can create multiple row conditions, and use the AND, OR, or IN keywords to connect the conditions.
How do I filter records in MySQL? ›If you want to delete a record from any MySQL table, then you can use the SQL command DELETE FROM. You can use this command at the mysql> prompt as well as in any script like PHP.
Is exists faster than in SQL? ›The EXISTS clause is much faster than IN when the subquery results is very large. Conversely, the IN clause is faster than EXISTS when the subquery results is very small.
What is the difference between exists and subquery in SQL? ›The sub-query is a SELECT statement. The EXISTS condition will be met & it will return TRUE if the subquery returns at least one record in its result set, else, the EXISTS condition will not be met and it will return FALSE. Note: The sub-query is returning for EVERY row in the outer query's table.
Which is faster in or exists in SQL? ›EXISTS is much faster than IN when the subquery results is very large. IN is faster than EXISTS when the subquery results is very small.
What to use instead of exists? ›
- continue.
- endure.
- happen.
- lie.
- live.
- occur.
- prevail.
- remain.
Ans:- NOT EXISTS SQL means nothing returned by the subquery. It is used to restrict the number of rows returned by the SELECT statement. In the server, it checks the Subquery for row existence, and if there are no browns then it will return true otherwise false.
Should I use exist or exists? ›It's all about the “person” and singular/plural. All but third person singular uses exist. Only third person singular use exists.
Which key is used to identify a record? ›A primary key, also called a primary keyword, is a column in a relational database table that's distinctive for each record. It's a unique identifier, such as a driver's license number, telephone number with area code or vehicle identification number (VIN).
What is the unique identifier for a database record? ›The unique identifier is a column or field in your database. Unique identifiers in a database are used to distinguish fields from each other. A unique identifier is used when information is called from the database and needs to be distinguished from other information in the database.
Which key can uniquely identify a database record? ›A primary key uniquely identifies each record in a table and must never be the same for two records. The primary key is a set of one or more fields ( columns) of a table that uniquely identify a record in a database table. A table can have only one primary key and one candidate key can select as a primary key.
How do you check if record already exists in SQL before INSERT? ›- CREATE TRIGGER [dbo].[trg_AfterInsert] ON [dbo].[Sample_Data]
- --Checking if the New records already existed in Master_Data table or Not.
- IF EXISTS(
- SELECT Distinct [Order_Id] From Inserted.
- EXCEPT.
Using the GROUP BY and HAVING clauses we can show the duplicates in table data. The GROUP BY statement in SQL is used to arrange identical data into groups with the help of some functions. i.e if a particular column has the same values in different rows then it will arrange these rows in a group.
What happens if you update a record that doesn't exist SQL? ›Update won't insert records if they don't exist, it will only update existing records in the table. Save this answer.
How to check if record exists before inserting in Oracle? ›Type a short Oracle program, using the following code as a guide: DECLARE record_exists INTEGER; BEGIN SELECT COUNT(*) INTO record_exists FROM your_table WHERE search_field = 'search value' AND ROWNUM = 1; IF record_exists = 1 THEN DBMS_OUTPUT. put_line('Record Exists') ELSE DBMS_OUTPUT.
How do I find duplicates before insert? ›
- Form your initial insertion query, such as "INSERT INTO your_table ( column1 , column2 ) VALUES ('1','a');"
- Alter the query by adding a rule for what to do if a duplicate key is found, such as "INSERT INTO your_table ( column1 , column2 ) VALUES ('1','a') ON DUPLICATE KEY UPDATE column1 ='1', column2 ='a';"
- SELECT @@IDENTITY. It returns the last IDENTITY value produced on a connection, regardless of the table that produced the value and of the scope of the statement that produced the value. ...
- SELECT SCOPE_IDENTITY() ...
- SELECT IDENT_CURRENT('TableName')
- Select the cells you want to check for duplicates. ...
- Click Home > Conditional Formatting > Highlight Cells Rules > Duplicate Values.
- In the box next to values with, pick the formatting you want to apply to the duplicate values, and then click OK.
The SQL intersect operator allows us to get common values between two tables or views. The following graphic shows what the intersect does. The set theory clearly explains what an intersect does. In mathematics, the intersection of A and B (A ∩ B) is the set that contains all elements of A that also belong to B.
What can I use instead of not exists in SQL? ›Most DBAs prefer to use the NOT EXISTS clause between NOT EXISTS and NOT IN operator. When SQL includes a NOT IN clause, a subquery is generally used. With NOT EXISTS, a correlated subquery is used. In many cases a NOT IN will produce the same execution plan as a NOT EXISTS query or a not equal query (!=).
What is the difference between insert and Upsert ADF? ›The INSERT option pushes the incoming records to the destination. The UPDATE option keeps track of the records being updated in the database table. The UPSERT option is the combination of 'Update' and 'Insert' which means that it will check for the records that are inserted or updated.
Can you update a record without updating its system fields? ›Yes, you can do it by using a function autoSysFields() in your server-side scripting. Whenever you are updating a record set the autoSysFields() to false. 'autoSysFields' is used to disable the update of 'sys' fields (Updated, Created, etc.)