Date
January 23, 2026
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Status
Done
INTRODUCTION
Parameters are variables that allow stored procedures to receive input data, return output data, or do both. They make stored procedures flexible, reusable, and dynamic by allowing different values to be passed each time the procedure is called. The Three Parameter Modes:
MySQL stored procedures support three distinct parameter modes:
- IN - Input parameters (default mode)
- OUT - Output parameters
- INOUT - Input/Output parameters (bidirectional)
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1.0 MySQL Stored Procedures: IN Parameters
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2.0 MySQL Stored Procedures: OUT Parameters
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3.0 MySQL Stored Procedures: INOUT Parameters
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Parameter Comparison Table
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Best Practices and Guidelines
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