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sql FEtCh

作用就是把游标当前的值赋给变量,举例如下: --定义游标 cursor c_ITEM(var_BH number, var_GSID varchar2) Is SELECT * FROM THDITEM A WHERE A.GSID=var_GSID AND A.THD01=var_BH; v_ITEM c_ITEM%RowType; --使用游标 Open c_ITEM(p_BH, ...

FETCH (Transact-SQL) 通过 Transact-SQL 服务器游标检索特定行。 Transact-SQL 语法约定 语法 FETCH [ [ NEXT | PRIOR | FIRST | LAST | ABSOLUTE { n | @nvar } | RELATIVE { n | @nvar } ] FROM ] { { [ GLOBAL ] cursor_name } | @cursor_va...

1、查询数据库(test)中的所有表名的方法: SELECT name FROM [test]..sysobjects where xtype='U' ******** 补充: 如果有的表不存在【时间】那就用下面的语句直接把含有【时间】列的表名找到: SELECT d.name FROM [test]..syscolumns a inner ...

fetch next from 游标名 into 变量列表 while @@fetch_status=0 begin ......... fetch next from 游标名 into 变量列表 end

你只修改这点点是不够的,还要删除掉FETCH,FOR游标不与FETCH配合使用,我感觉你纯粹是在乱写 declare cursor dept_cur is select deptno, dname from dept where deptno < 40; cursor dept_cur2(pno number) is select ename, job, hiredate, sa...

fetch next from mycursor into @O_ID,@A_Salary while(@@fetch_status = 0) begin Update OriginSalary set O_Salary=O_Salary+@A_Salary where O_ID=@O_ID fetch next from mycursor into @O_ID,@A_Salary end 假设表tempTable id,text 1,T1 2...

你写的乱呼呼的,我给你改了: declare @a int declare cur cursor for select top 1 a from A open cur fetch next from cur into @a while @@fetch_status = 0 begin insert into B values (@a) fetch next from cur into @a end close cur de...

#ifndef ___LIB_DB___ #define ___LIB_DB___ extern int DB_Open(char * dbcn, char * usr, char * pwd); extern int DB_Exec(char * sql); extern void * DB_Query(char *sql, const char *fmt, ...); extern int DB_Next(void * hRecordset); ...

//$stmt = sqlsrv_query($sql);// 上面这句有问题,类似如下写法:$serverName = "serverName\sqlexpress" ;$connectionInfo = array( "Database" => "dbName" , "UID" => "username" , "PWD" => "password" );$conn = sqlsrv_connect ( $server...

首先说明,楼主读取游标的写法是正确规范的写法,效率应该也是最高的,不明白为什么非要只让fetch出现一次。 如果非要这样,可以按这个思路,在定义游标之后,再统计出此游标将会查询出的记录总数,然后定义变量,在循环中使变量增1,超过游标记...

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