어셈블리: Microsoft.SqlServer.TransactSql.ScriptDom(Microsoft.SqlServer.TransactSql.ScriptDom.dll) 구문C# 복사 [SerializableAttribute] public class IfStatement : TSqlStatement IfStatement 유형에
IfStatement 类型公开以下成员。 方法 展开表 名称说明 Accept Accepts the visitor. (覆盖 TSqlFragment.Accept(TSqlFragmentVisitor)。) AcceptChildren Accepts the visitor for Children. (覆盖 TSqlStatement.AcceptChildren(TSqlFragmentVisitor)。) Equals (从 Object 继承。) Finalize (从 Object 继承。) Get...
Use the IF statement for control flow, which is unlike theIIf (MDX)function and theCASE Statement (MDX)that can only be used to return values or objects. Examples In the following example, the scope is restricted to the Country level of the Customers Geography hierarchy in the Customers dime...
SQL Server 查询:IF (EXISTS (SELECT * FROM failed_logins_ip_address WHERE ip_address = 'xxx')) BEGIN UPDATE failed_logins_ip_address SET attempts_count = attempts_count + 1, attempt_datetime = CURRENT_TIMESTAMP WHERE ip_address = 'xxx' END ELSE BEGIN INSERT INTO failed_logins_ip_address...
Use the IF statement within PL/SQL contexts to execute SQL statements on the basis of certain criteria. The four forms of the IF statement are: IF...THEN...END IF IF...THEN...ELSE...END IF IF...THEN...ELSE IF...END IF
{ sql_statement | statement_block }使用语句块定义的任何有效的Transact-SQL语句或语句分组。要定义语句块(批处理),请使用流语言关键字BEGIN和END 组合。尽管所有Transact-SQL语句在BEGIN…END块中都是有效的,但某些Transact-SQL语句不应在同一批(语句块)中组合在一起。 示例1: 1 2 3 4 IF DATENAME(weekday...
if sql语句 This article explores the useful function SQL IF statement inSQL Server. 本文探讨了SQL Server中有用的函数SQL IF语句。 介绍(Introduction) In real life, we make decisions based on the conditions. For example, look at the following conditions. ...
SqlParser.Parser.Internals Microsoft.SqlServer.Management.SqlParser.SqlCodeDom Microsoft.SqlServer.Management.SqlParser.SqlCodeDom CreateIndexKeyList CreateIndexStart CreateTypeStatementInfo CreateUserStatementFactory CursorDefinitionInfo DdlTargetObjectType DmlTarget Functio...
'ip_addess' 列是唯一的,MSSQL 和 MySQL 的表结构相同。 是否有可以在两种数据库类型中执行 IF INSERT ELSE UPDATE 的语法? 是的,我做(PDO)参数绑定,xxx只是为了缩短代码片段。 是的,如果我在两个查询(首先选择,然后插入或更新)中执行相同的语法,我可以使用相同的语法,但我想避免(希望)不必要的查询。
IF...THEN 语句是 IF 的最简单形式。仅当条件求值为 TRUE 时,才会执行 THEN 与 END IF 之间的语句。在以下示例中,IF...THEN 语句用来测试和显示那些有佣金的职员。 DECLARE v_empno emp.empno%TYPE; v_comm emp.comm%TYPE; CURSOR emp_cursor IS SELECT empno, comm FROM emp; ...