相关疑难解决方法(0)

如何声明变量以用于PostgreSQL 8.3查询？

在MS SQL Server中,我可以这样做:

DECLARE @myvar INT
SET @myvar = 5

SELECT *
FROM somewhere
WHERE something = @myvar

我如何在PostgreSQL中做同样的事情？根据文档变量被简单地声明为"名称类型;",但这给了我一个语法错误:

myvar INTEGER;

有人能给我一个正确语法的例子吗？

我试图使用inner join以下查询使用视图和表

SELECT 
   AcId, AcName, PldepPer, RepId, CustCatg, HardCode, BlockCust, CrPeriod, CrLimit, 
   BillLimit, Mode, PNotes, gtab82.memno 
FROM
   VCustomer 
INNER JOIN   
   vcustomer AS v1 ON gtab82.memacid = v1.acid 
WHERE (AcGrCode = '204' OR CreDebt = 'True') 
AND Masked = 'false'
ORDER BY AcName

而错误是

missing FROM-clause entry for table "gtab82"