局部变量必须以@ 开头,而且必须先用DECLARE 命令说明后才可使用。 使用SELECT 或SET 命令来设定变量的值 说明形式如下: DECLARE @变量名 变量类型 [ @变量名 变量类型] SELECT @局部变量 = 变量值 SET @局部变量= 变量值 如: declare @name char 30 @wage money select @name = e_name @wage = e_wage...
How to SET a variable in CASE statement.. How to set auto delete function in SQL Server ? How to set Identity_Insert in dynamic sql? How to set SQL Server Login MUST_CHANGE, CHECK_POLICY, CHECK_EXPIRATION all to OFF with T-SQL How to set the default query for the SSMS 'New Query...
AlterDatabaseScopedConfigurationStatement AlterDatabaseSetStatement AlterDatabaseStatement AlterDatabaseTermination AlterEndpointStatement AlterEventSessionStatement AlterEventSessionStatementType AlterExternalDataSourceStatement AlterExternalResourcePoolStatement AlterFederationKind AlterFederationStatement ...
SELECT @user_variable1 := expression1 [, variable2 = expression2, ...]; 其中,user_variable1、user_variable2为用户变量名,用户变量名可以由当前字符集的文字数字字符、'.'、'_'和'$'组成。当变量名中需要包含一些特殊符号(比如空格、#等)时,可以使用双引号或单引号将整个变量括起来。expressiion1、ex...
select *from customerswhere address like ‘%Trail%’ oraddress like ‘%avenue%’LIKE 执行优先级在逻辑运算符之后,毕竟 IN BETWEEN LIKE 本质可看作是比较运算符的简化,应该和比较运算同级,数学→比较→逻辑,始终记住这个顺序,上面这个如果用正则表达式会简单得多 ...
SQL语句尚未结束(SQL_STATEMENT_NOT_YET_COMPLETE) 类08 - 连接异常 08000 连接异常(CONNECTION_EXCEPTION) 08003 连接不存在(CONNECTION_DOES_NOT_EXIST) 08006 连接失败(CONNECTION_FAILURE) 08001 SQL客户端不能建立SQL连接(SQLCLIENT_UNABLE_TO_ESTABLISH_SQLCONNECTION) 08004 SQL服务器拒绝建立SQL连接(SQLSERVER_REJ...
SET @@LOCAL.SQL_SELECT_LIMIT = DEFAULT; 1. 1.1.2 用户变量 用户可以在表达式在使用自己定义的变量,这样的变量叫做用户变量。 用户可以现在用户变量中保存值,然后再引用它,这样可以将值从一个语句传递到另一个语句。在使用用户变量之前,必须定义和初始化。如果使用没有初始化的变量,它的值为 NULL。
(SELECT ALT_LABEL||CASE WHEN COALESCE(LABEL,'') = '' THEN '' ELSE '('||LABEL||')' END FROM CNT_MEASUREMENT_TEMPLATE_SIZE WHERE PARENT_ID = MEASUREMENT_TEMPLATE.ID ORDER BY SEQ_NO),', ')); --- set sizes value for cnt_measurement_template whose sizes value is null or '' ---...
이름설명 SetVariableStatement Initializes a new instance of the SetVariableStatement class.맨 위로 이동속성테이블 확장 이름설명 AssignmentKind Gets or sets the assignment operator used. CursorDefinition Gets or sets the cursor - if not nullnull 참조(Visual...
-- Declare variable. -- Note that the buffer here is only 200 characters long. DECLARE@commandvarchar(200) -- Construct the dynamic Transact-SQL. -- In the following statement, we need a total of 154 characters -- to set the password of 'sa'. ...