syntaxsql 복사 IF Boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] 참고 SQL Server 2014(12.x) 및 이전 버전에 대한 Transact-SQL 구문을 보려면 이전 버전 설명서를 참조 하세요....
syntaxsql IFboolean_expression{sql_statement|statement_block} [ELSE{sql_statement|statement_block} ] 引數 boolean_expression 傳回 或FALSE的TRUE表達式。 如果布爾表達式包含SELECT語句,SELECT語句必須以括弧括住。 {sql_statement|statement_block} 使用語句區塊所定義的任何 Transact-SQL 語句或語句群組。 除非使...
Transact-SQL 語法慣例 語法 syntaxsql IFboolean_expression{sql_statement|statement_block} [ELSE{sql_statement|statement_block} ] 引數 boolean_expression 傳回 或FALSE的TRUE表達式。如果boolean_expression包含SELECT語句,SELECT語句必須以括弧括住。 {sql_statement|statement_block} ...
The syntax consists of keywords like IF, BEGIN, END, and ELSE. Other than this, there is a necessity to mention the condition or expression after the IF keyword that ultimately evaluates to a boolean value. Further, whichever statements are to be executed if the boolean expression or condition...
2个原因。1.Switch case 做不了复杂的判断，这个是最常见的，比如c/c++里对字符串特征的判断。2.一...
SQL Server 流程控制中的 If...Else 语句。 1,If...Else 语句 1--===2--1, If...Else语句3--Desc:If..Else语句是条件判断语句4--author:ylbtech5--pubdate:10:39 2012/12/156--===7go89go10--===
Syntax If_Else_Statement := 'IF'Boolean_Expression'THEN'U-SQL_Statement[ 'ELSEIF'Boolean_Expression'THEN'U-SQL_Statement] [ 'ELSE'Boolean_Expression'THEN'U-SQL_Statement] 'END'. Remarks Boolean_Expression Is a constant-foldable expression that returns TRUE or FALSE. ...
mysql 存储过程 中 if else mysql存储过程definer,存储过程和函数mysql>HELPCREATEPROCEDURE;Name:'CREATEPROCEDURE'Description:Syntax:CREATE[DEFINER={user|CURRENT_USER}]PROCEDUREsp_name([proc_parameter[,...]])[characteristic
syntaxsql IFboolean_expression{sql_statement|statement_block} [ELSE{sql_statement|statement_block} ] Arguments boolean_expression An expression that returnsTRUEorFALSE. If theboolean_expressioncontains aSELECTstatement, theSELECTstatement must be enclosed in parentheses. ...
else:密码错误,明天再来 else:不看了,把页面关了吧 判断的定义 如果 条件满足,才能做某件事情 如果 条件不满足,就做另外一件事情...判断语句——switch case 判断语句——switch case 在java中不仅仅有循环语句和条件语句,还有switch case(判断语句),主要是判断一个变量与一系列值中某个值是否相等,每个值称...