Control Flow Functions

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TiDB supports all of the control flow functions available in MySQL 5.7.

Name	Description
`CASE`	Case operator
`IF()`	If/else construct
`IFNULL()`	Null if/else construct
`NULLIF()`	Return NULL if expr1 = expr2

Control Flow Functionswas last updated 12/28/2022, 3:36:17 AM: v6.5: remove aliases (#11751)

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