-- Assign the function result to the variable: SET @MyResult = SQRT(@MyNumber) -- Return the variable value SELECT @MyResult 用SELECT给变量赋值 使用SELECT的另一种形式也可以获得同样的结果。对变量要在赋值前要先声明。使用SELECT语句来替代SET命令的主要优点是,可以在一个操作内同时给多个变量赋...
ResultSetType resultSetTypeEnum=null;//创建 SqlSourceSqlSource sqlSource =langDriver.createSqlSource(configuration, nodeToHandle, parameterTypeClass);/** <selectKey> 节点中只能配置 SELECT 查询语句, * 因此 sqlCommandType 为 SqlCommandType.SELECT*/SqlCommandType sqlCommandType=SqlCommandType.SELECT;/** ...
Usage: sqlcmd [flags] sqlcmd [command] Examples: # Install/Create, Query, Uninstall SQL Server sqlcmd create mssql --accept-eula --using https://aka.ms/AdventureWorksLT.bak sqlcmd open ads sqlcmd query "SELECT @@version" sqlcmd delete # View configuration information and connection strings...
SELECT UPDATE MERGE Transact-SQL 语法约定 语法 <query_hint > ::= { { HASH | ORDER } GROUP | { CONCAT | HASH | MERGE } UNION | { LOOP | MERGE | HASH } JOIN | FAST number_rows | FORCE ORDER | MAXDOP number_of_processors | OPTIMIZE FOR ( @variable_name { UNKNOWN | = literal_...
getBaseTblResultExprs()); // Slot物化 处理 where 语句的子查询 selectStmt.materializeRequiredSlots(analyzer); 投影下推:BE 在 Scan 时只会 Scan 必须读取的列 代码语言:javascript 代码运行次数:0 运行 AI代码解释 projectPlanNode(resultSlotIds, root); 谓词下推:在满足语义正确的前提下将过滤条件尽...
of 90, which isn't supported for other databases. This doesn't have an effect on the functionality of replication. Upgrading to later service packs and versions of SQL Server will result in the compatibility level of the distribution database to be increased to match ...
Applies to:SQL ServerAzure SQL DatabaseAzure SQL Managed Instance Creates a user-defined function (UDF), which is a Transact-SQL or common language runtime (CLR) routine. A user-defined function accepts parameters, performs an action such as a complex calculation, and returns the result of ...
@table_variable 将表 变量指定为表源。 SET 指定要更新的列或变量名称的列表。 column_name 包含要更改的数据的列。 column_name 必须存在于 table_or view_name 中。 无法更新标识列。 expression 返回单个值的变量、文字值、表达式或嵌套 select 语句(加括号)。 expression 返回的值替换 column_name 或 @ 变...
SelectSetVariable.Expression Property Reference Feedback Definition Namespace: Microsoft.SqlServer.TransactSql.ScriptDom Assembly: Microsoft.SqlServer.TransactSql.ScriptDom.dll Package: Microsoft.SqlServer.TransactSql.ScriptDom v161.8901.0 Expression that is going to be used to set the variable....
when predn then resultnelse result0;end 标量子查询可以用在set子句中 举例：把每个student元组的tot_cred属性设置为该生成功学完的课程学分的综合，假设学生在某门课程上的成绩既不是"F"也不是空update student Sset tot_cred = (select sum(credits)from takes natural join coursewhere S.ID = takes.ID ...