Summary of definition and usage of control flow functions

Grammar: CASE value WHEN [compare-value] THEN result [WHEN [compare-value] THEN result ...] [ELSE result] END CASE WHEN [condition] THEN result [WHEN [condition] THEN result ... ] [ELSE result] END In the return result of the first solution, value=compare-value. The return result of the second scenario is the true result of the first scenario. If there is no matching result value, the return result is the result after ELSE. If there is no ELSE part, the return value is NULL. mysql> SELECT CASE 1

1.MySQL Basic Tutorial 6 - Function Control Flow Function

##Introduction: Syntax: CASE value WHEN[compare-value]THEN result [WHEN[compare-value]THEN result ...][ELSE result]ENDCASEWHEN[condition]THEN result [WHEN[c ...

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##Introduction: Summary: Boolean types are mostly used to control processes. When comparing two objects, you can use "==" to determine whether it is true. In addition, when using Boolean variables for process control, you can use them directly without comparing with the true keyword, as shown in Program 2-4. Show. ...

6.

mysql control process function

##Introduction: CASE value WHEN [compare-value] THEN result [WHEN [compare-value] THEN result ...] [ELSE result] END CASE WHEN [condition] THEN result [WHEN [condition] THEN result .. .] [ELSE result] END

7.

How to flexibly use if examples in MySQL statements

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9.MySQL control process function

Introduction: Welcome to the Linux Community Forum, Interact and communicate with 2 million technical personnel>>Enter CASE value WHEN [compare-value] THEN result [WHEN [compare-value] THEN result ...] [ELSE result] END CASE WHEN [condition] THEN result [WHEN [ condition] THEN result ...] [ELSE result] E

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