Represents setting a variable inside a SELECT statement.Namespace: Microsoft.Data.Schema.ScriptDom.Sql Assembly: Microsoft.Data.Schema.ScriptDom.Sql (in Microsoft.Data.Schema.ScriptDom.Sql.dll)SyntaxC# 复制 [SerializableAttribute] public class SelectSetVariable : TSqlFragment ...
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...
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 from employee where emp_id = '10010001' 2、BEGIN…END BEGIN...
setline300pages999coluserhostfora30colos_usernamefora10colusernamefora8colaction_namefora8colsql_textfora80colownerfora8colobj_namefora20colcurrent_userfora12altersessionsetnls_date_format='yyyy-mm-dd hh24:mi:ss';selectos_username,username,userhost,timestamp,owner,obj_name,sql_text,current_userfrom...
When reading rows in sorted order after a sort, the rows are read through this buffer to avoid disk seeks. Setting the variable to a large value can improve ORDER BY performance by a lot. However, this is a buffer allocated for each client, so you should not set the global variable to...
SET @ParmDefinition = N'@CustomerID int, @SalesOrderOUT nvarchar(25) OUTPUT'; SET @IntVariable = 22276; EXECUTE sp_executesql @SQLString ,@ParmDefinition ,@CustomerID = @IntVariable ,@SalesOrderOUT = @SalesOrderNumber OUTPUT; -- This SELECT statement returns the value of the OUTPUT parameter...
| Variable_name | Value | +---+---+ | character_set_client | utf8 | | character_set_connection | utf8 | | character_set_database | utf8 | | character_set_filesystem | binary | | character_set_results | utf8 | | character_set_server | utf8 | |...
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open[Global]cursor_name|cursor_variable_name cursor_name:游标名,cursor_variable_name:游标变量名称,该变量引用了一个游标。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 --打开游标 open orderNum_02_cursor 4,提取数据 代码语言:javascript
例 下面的代码片段示例如何使用 ANSI 动态 SQL,分配了输入描述符‘in’与输出描述符‘out’,准备并执行一个查询语句,用 SET DESCRIPTOR 设置描述符,用 GET DESCRIPTOR 获取描述符的相关属性值。 #include <stdio.h> EXEC SQL INCLUDE SQLCA; EXEC SQL BEGIN DECLARE SECTION; char* dyn_statement = "SELECT nam...