postgres case statement

In summary, the use of switch is to determine if the expression after the case matches the expression after switch, and once the case is matched, the subsequent program code is executed, regardless of whether the following case matches until the break was met . Do not match to find default. No matter where default is placed. As soon as a junction (

Switch syntax The code is as follows Copy Code switch (expression){case constant Expression 1: statement 1;....Case constant Expression 2: statement 2;Default: statement;} Default is to execute it if it is not matched, and default is no

Tags: Linux shell1.case structural Conditional statement syntaxThe case statement is actually the canonical multi-branch if statementCase "string variable" inValue 1) Instruction 1 ...;;Value 2) Instruction 2 ...;;*) Instruction 3 ...EsacChinese programming Syntax:Case "Find a girlfriend condition" inHave a room) to ma

look at this. When this value is set to 0 o'clock, a table with a self-increasing field inserts the behavior of a row of data: 1) Apply for Auto_inc lock 2) Get the current AUTO_INCREMNT value N, give auto_increment plus 1 3) Perform the insert operation and fill n into the new row corresponding field 4) Release Auto_inc lock We see this process, although innodb in order to reduce the size of the lock, the execution of the statement is released

This article will introduce the usage of the oracle/plsql case Condition Statement, which is similar to mysql mssql. If you need to learn more, let's take a look. Statement syntax The Code is as follows: Copy code CASE [expression]WHEN condition_1 THEN result_1WHEN condition_2 THEN result_2...WH

Case has two formats. Simple case functions and case search functions. -- Simple case Function Case Sex When '1' Then Male' When '2' Then Female' Else 'Others' End -- Case search function

Next we will talk about the mysql stored procedure case statement syntax and instance tutorial. on the home page, let's take a look at the simple description of the case statement, and then explain the specific usage of the case with examples. Next we will talk aboutMysql tu

If statements process two branches, the IF-else-If structure must be used when processing multiple branches. However, if there are many branches, the more nested if statement layers,ProgramIt is not only huge but also difficult to understand. Therefore, the C language provides a conditional selection statement specifically used to process multi-branch structures, calledSwitch

Select Case statement Execute several sets of statements based on the expression value. Select Case testexpression[Case expressionlist-n[statements-n]] . . .[Case Else expressionlist-n[elsestatements-n]]End SelectParameters Testexpression Any number or string expression. Exp

label: des Io ar uses on art log EF as For such a combined logic circuit [email protected] (x) Case (x) x1: X2 :...... Endcase if the branch item contains all the values of variable X and does not overlap with each other, there is no need to use a comprehensive command in this case. (1) Some books in "// synthesis parallel_case" are used to introduce case statem

Keyword: case Case has two formats. Simple Case functions and Case search functions. -- Simple Case Function CASE sex WHEN '1' THEN 'male' WHEN '2' THEN 'female' ELSE 'others' END -- Case