However, if you use the INSERT IGNORE statement, MySQL will issue a warning instead of an error. When the strict mode is on, MySQL returns an error and aborts the INSERT statement if you try to insert invalid values into a table. If you query data from subscribers table, you will find that only one row was actually inserted and the row that causes the error was not. In conclusion, when you use the INSERT IGNORE statement, instead of issuing an error, MySQL issued a warning in case an error occurs. To find the detail of the warning, you can use the SHOW WARNINGS command as shown below: SHOW WARNINGS 1 row(s) affected, 1 warning(s): 1062 Duplicate entry for key 'email' Records: 2 Duplicates: 1 Warnings: 1
MySQL returned a message indicating that one row was inserted and the other row was ignored. However, if you use the INSERT IGNORE statement instead. Duplicate entry for key 'email'Īs indicated in the error message, the email UNIQUE constraint. Let’s execute another statement that inserts two rows into the subscribers table: INSERT INTO subscribers(email) VALUES( language: SQL (Structured Query Language) ( sql ) The following statement inserts a new row into the subscribers table: INSERT INTO subscribers(email) The UNIQUE constraint ensures that no duplicate email exists in the email column. We will create a new table called subscribers for the demonstration. Note that the IGNORE clause is an extension of MySQL to the SQL standard. The syntax of the INSERT IGNORE statement is as follows: INSERT IGNORE INTO table(column_list)Ĭode language: SQL (Structured Query Language) ( sql ) However, if you use the INSERT IGNORE statement, the rows with invalid data that cause the error are ignored and the rows with valid data are inserted into the table. As the result, no rows are inserted into the table.
When you use the INSERT statement to add multiple rows to a table and if an error occurs during the processing, MySQL terminates the statement and returns an error. Introduction to MySQL INSERT IGNORE statement
#Mysql insert into without primary key how to#
Summary: in this tutorial, you will learn how to use the MySQL INSERT IGNORE statement to insert data into a table.
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