What is delimiter in mysql

/*

Delimiters other than the default ; are typically used when defining functions, stored procedures, and triggers wherein you must define multiple statements. You define a different delimiter like $$ which is used to define the end of the entire procedure, but inside it, individual statements are each terminated by ;. That way, when the code is run in the mysql client, the client can tell where the entire procedure ends and execute it as a unit rather than executing the individual statements inside.

Note that the DELIMITER keyword is a function of the command line mysql client (and some other clients) only and not a regular MySQL language feature. It won't work if you tried to pass it through a programming language API to MySQL. Some other clients like PHPMyAdmin have other methods to specify a non-default delimiter.

*/

/* Example:*/

DELIMITER $$
/* This is a complete statement, not part of the procedure, so use the custom delimiter $$ */
DROP PROCEDURE my_procedure$$

/* Now start the procedure code */
CREATE PROCEDURE my_procedure ()
BEGIN    
  /* Inside the procedure, individual statements terminate with ; */
  CREATE TABLE tablea (
     col1 INT,
     col2 INT
  );

  INSERT INTO tablea
    SELECT * FROM table1;

  CREATE TABLE tableb (
     col1 INT,
     col2 INT
  );
  INSERT INTO tableb
    SELECT * FROM table2;
  
/* whole procedure ends with the custom delimiter */
END$$

/* Finally, reset the delimiter to the default ; */
DELIMITER ;

Source: stackoverflow.com

Similar codes

0 vote195 views1 answer
Mysql add to number
SQL
1 vote188 views2 answers
Grab part of a string sql
SQL
0 vote185 views1 answer
Create_engine sqlalchemy with parsed url sql server
SQL
11 votes198 views6 answers
Mysql else if
SQL
0 vote186 views1 answer
Sql: extract day text from datetime value
SQL
0 vote189 views1 answer
Sum value by month sql
SQL
1 vote217 views1 answer
How not to sort by average rating
SQL
5 votes194 views3 answers
Oracle list columns in schema
SQL
0 vote266 views1 answer
Drop all data from tables
SQL
1 vote262 views1 answer
Sql to mongodb query converter
SQL