合并 SQL 查询的结果

Question

我正在尝试将此查询的所有数据合并到一个列表中。 'Union' 没有帮助...

有什么想法吗？

DECLARE @cnt INT = 0
DECLARE @SQLQuery AS NVARCHAR(500)
DECLARE @items AS VARCHAR(500)
DECLARE @stline AS VARCHAR(500)



while @cnt < 101

begin 

set @items = 'LG_0' + convert(nvarchar(3),@cnt) + '_ITEMS'
set @stline = 'LG_0' + convert(nvarchar(3),@cnt) + '_01_STLINE'

if (OBJECT_ID (@items) is not null and OBJECT_ID(@stline) is not null ) 

set @SQLQuery = 'SELECT
    ITM1.CODE, itm1.NAME, max (stl.date_) [latest date] , price as [latest price], '+ convert(nvarchar(3),@cnt) + ' as [proje kodu]

FROM ' + @items + ' ITM1 INNER JOIN ' + @stline +  ' STL 
    ON ITM1.LOGICALREF = STL.STOCKREF
WHERE PRICE > 0 
    AND TRCODE = 1 
    AND CANCELLED = 0 
    AND INVOICEREF > 0 


    group by code, name, stl.DATE_ , price

    '

    exec (@SQLQuery)



    set @cnt = @cnt +1 


end

结果是这样的：

但我希望它们全部合并...（很抱歉主要是代码问题，我必须在此处添加更多内容）

Answer 1

我不知道为什么 UNION 对你不起作用，但以下应该有效：

 DECLARE @cnt INT = 0
    DECLARE @SQLQuery AS NVARCHAR(MAX)  = ''
    DECLARE @items AS VARCHAR(500)
    DECLARE @stline AS VARCHAR(500)

    while @cnt < 101

    begin 

    set @items = 'LG_0' + convert(nvarchar(3),@cnt) + '_ITEMS'
    set @stline = 'LG_0' + convert(nvarchar(3),@cnt) + '_01_STLINE'

    if (OBJECT_ID (@items) is not null and OBJECT_ID(@stline) is not null ) 

    set @SQLQuery = @SQLQuery + 'SELECT
        ITM1.CODE, itm1.NAME, max (stl.date_) [latest date] , price as [latest price], '+ convert(nvarchar(3),@cnt) + ' as [proje kodu]

        FROM ' + @items + ' ITM1 INNER JOIN ' + @stline +  ' STL 
            ON ITM1.LOGICALREF = STL.STOCKREF
        WHERE PRICE > 0 
            AND TRCODE = 1 
            AND CANCELLED = 0 
            AND INVOICEREF > 0 
        GROUP BY code, name, stl.DATE_ , price

        UNION ALL
        '    
        set @cnt = @cnt +1 

    end 

    -- SUBSTRING to remove last UNION ALL
    SELECT @SQLQuery = SUBSTRING(@SQLQuery, 1, LEN(@SQLQuery) - 18) 

    -- For debugging purposes
    -- PRINT @SQLQuery
    exec (@SQLQuery)

我无法测试它，但您可以注释 exec，并取消注释 PRINT 以查看正在生成的查询。它使调试动态 SQL 变得容易得多。

此代码背后的想法：首先根据您的条件构建 UNION ALL 查询。最后去掉最后的UNION ALL，代码就可以执行了。

Answer 2

DECLARE @cnt INT = 0
DECLARE @SQLQuery AS NVARCHAR(max)
DECLARE @items AS VARCHAR(500)
DECLARE @stline AS VARCHAR(500)

set @SQLQuery =''

while @cnt < 101

begin 

set @items = 'LG_0' + convert(nvarchar(3),@cnt) + '_ITEMS'
set @stline = 'LG_0' + convert(nvarchar(3),@cnt) + '_01_STLINE'

if (OBJECT_ID (@items) is not null and OBJECT_ID(@stline) is not null ) 

set @SQLQuery = @SQLQuery + 'SELECT
    ITM1.CODE, itm1.NAME, max (stl.date_) [latest date] , price as [latest price], '+ convert(nvarchar(3),@cnt) + ' as [proje kodu]

    FROM ' + @items + ' ITM1 INNER JOIN ' + @stline +  ' STL 
        ON ITM1.LOGICALREF = STL.STOCKREF
    WHERE PRICE > 0 
        AND TRCODE = 1 
        AND CANCELLED = 0 
        AND INVOICEREF > 0 
    GROUP BY code, name, stl.DATE_ , price

    UNION ALL

    '    
    set @cnt = @cnt +1 
end 

-- SUBSTRING to remove last UNION ALL
--PRINT len(@SQLQuery)

set @SQLQuery = left ( @SQLQuery , len(@SQLQuery)-18)


--PRINT len(@SQLQuery)

-- print @SQLQuery

-- For debugging purposes
-- PRINT @SQLQuery
exec (@SQLQuery)

合并 SQL 查询的结果

merging the results of a SQL query

tsql

sql-server

union