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选择插入中的SQL Server子查询

[英]SQL Server Sub query in select insert

Any suggestions on getting this to work? 有关使此工作的任何建议? syntactically it is correct, and the individual sub-queries return a single result, however when combined the sub-queries do not return results to the insert statement. 语法上它是正确的,并且各个子查询返回单个结果,但是当组合时,子查询不会将结果返回到insert语句。 Essentially i am trying to insert these records into the table if they do not exist in the view. 基本上我试图将这些记录插入到表中,如果它们在视图中不存在的话。

INSERT INTO PRG_T_BLK_MDL (BLK_ID, MDL_ID, GW, VE)
    OUTPUT @@ROWCOUNT AS RC
    SELECT (SELECT ID FROM PRG_T_BLK WHERE NAME=1),
            (SELECT ID FROM PRG_T_MDL WHERE NAME='A'), 3500, 'AX'
    FROM PRG_V_BLK_MDL
    WHERE NOT EXISTS(SELECT 1 FROM PRG_V_BLK_MDL WHERE BLK=1 AND MDL='A' AND VER='AX')

I am guessing that the OUTPUT clause works (I haven't used it with @@ROWCOUNT , but it seems ok). 我猜测OUTPUT子句有效(我没有用@@ROWCOUNT ,但似乎没问题)。

You don't need a FROM clause -- at least not with the entire table. 您不需要FROM子句 - 至少不需要整个表。 I might suggest: 我可能会建议:

INSERT INTO PRG_T_BLK_MDL (BLK_ID, MDL_ID, GW, VE)
    OUTPUT @@ROWCOUNT AS RC
    SELECT (SELECT ID FROM PRG_T_BLK WHERE NAME = t.BLK),
            (SELECT ID FROM PRG_T_MDL WHERE NAME = t.MDL), 3500, t.ver
    FROM (SELECT 1 as BLK, 'A' as MDL, 'AX' as ver) t
    WHERE NOT EXISTS (SELECT 1
                      FROM PRG_V_BLK_MDL v
                      WHERE v.BLK = t.BLK AND v.MDL = t.MDL AND v.ver = t.ver);

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