![]() WHERE id = 1 Code language: SQL (Structured Query Language) ( sql ) The following statement uses the REPLACE INTO statement to copy a row within the same table: REPLACE INTO Note that this form of the REPLACE statement is similar to INSERT INTO SELECT statement. WHERE where_condition Code language: SQL (Structured Query Language) ( sql ) The following illustrates the REPLACE statement that inserts data into a table with the data coming from a query. SELECT * FROM cities Code language: SQL (Structured Query Language) ( sql ) Using MySQL REPLACE to insert data from a SELECT statement Unlike the UPDATE statement, if you don’t specify the value for the column in the SET clause, the REPLACE statement will use the default value of that column. Population = 1768980 Code language: SQL (Structured Query Language) ( sql ) This example uses the REPLACE statement to update the population of the city Phoenix to 1768980: REPLACE INTO cities This statement is like the UPDATE statement except for the REPLACE keyword. The following illustrates how to use the REPLACE statement to update data: REPLACE INTO table SET column1 = value1,Ĭolumn2 = value2 Code language: SQL (Structured Query Language) ( sql ) Using MySQL REPLACE statement to update a row Because no value is specified for the name column, it was set to NULL. Then, the REPLACE statement deleted the row with id 2 and inserted a new row with the same id 2 and population 3696820.The insertion failed because the id 2 already exists in the cities table. First, the REPLACE statement attempted to insert a new row into cities the table.The value of the name column is NULL now. ![]() SELECT * FROM cities Code language: SQL (Structured Query Language) ( sql ) VALUES( 2, 3696820) Code language: SQL (Structured Query Language) ( sql )įinally, query the data of the cities table again to verify the replacement. SELECT * FROM cities Code language: SQL (Structured Query Language) ( sql )Īfter that, use the REPLACE statement to update the population of the Los Angeles city to 3696820. ![]() Then, query data from the cities table to verify the insert operation. ( 'San Diego', 1223405) Code language: SQL (Structured Query Language) ( sql ) Next, insert some rows into the cities table: INSERT INTO cities( name,population) ) Code language: SQL (Structured Query Language) ( sql ) Let’s take a look at the following example of using the REPLACE statement to see how it works.įirst, create a new table named cities as follows: CREATE TABLE cities ( It is similar to the INSERT statement except for the keyword REPLACE. VALUES(value_list) Code language: SQL (Structured Query Language) ( sql ) The following illustrates the syntax of the REPLACE statement: REPLACE table_name(column_list) Notice that MySQL has the REPLACE string function which is not the REPLACE statement covered in this tutorial. To use the REPLACE statement, you need to have at least both INSERT and DELETE privileges for the table. If the table does not have one of these indexes, the REPLACE statement works like an INSERT statement. To determine whether the new row that already exists in the table, MySQL uses PRIMARY KEY or UNIQUE KEY index. Insert the new row into the table again.Delete the conflicting row that causes the duplicate key error from the table.If the insertion fails due to a duplicate-key error occurs: ![]() Insert a new row into the table, if a duplicate key error occurs. The MySQL REPLACE statement works as follows: The MySQL REPLACE statement is an extension to the SQL Standard. Summary : in this tutorial, you will learn how to use the MySQL REPLACE statement to insert or update data in database tables.
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