How to Convert an MS SQL Stored Procedure to MySQL Syntax

Learn how to effectively convert an MS SQL stored procedure to MySQL syntax with step-by-step guidance.
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How to Convert an MS SQL Stored Procedure to MySQL Syntax

When transitioning from MS SQL (Microsoft SQL Server) to MySQL, converting stored procedures can often be one of the more challenging tasks. Both databases have their own syntax and functions, so a direct copy-paste will not work. Below, we'll walk you through a basic approach to converting an MS SQL stored procedure to MySQL syntax.

Basic Syntax Differences

Delimiters

MS SQL uses GO to separate commands in scripts.

MySQL uses a semicolon ;, but you can also change the default delimiter.

Execution

MS SQL: EXEC or EXECUTE

MySQL: Simply use CALL

Control Structures

IF...ELSE

MS SQL:

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MySQL:

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WHILE Loop

MS SQL:

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MySQL:

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Variable Declaration

MS SQL:

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MySQL:

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Note: Variable declarations in MySQL have to be done at the beginning of the stored procedure, right after the BEGIN keyword.

Error Handling

MS SQL:

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MySQL:

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Example Conversion

Consider the following MS SQL stored procedure:

MS SQL:

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MySQL:

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Conclusion

Converting MS SQL stored procedures to MySQL involves understanding the syntactical differences between the two databases. By carefully translating each part of the stored procedure, you ensure that your application continues to function smoothly after the migration. Always test your converted stored procedures thoroughly to catch any issues that may arise from subtle differences in behavior between MS SQL and MySQL.