选择列SQL

Question

我有两个表和以下查询：

table1 
--------- 
table1Id(pk) 
fromdate, 
todate, 
name, 
link 

table2 
-------- 
table2Id(pk) 
url 
table1Id(fk) 

SELECT @ITEM = table1Id FROM table1 
    WHERE 
     table1.FromDate <= @ToDate AND @FromDate <= table1.ToDate 


select * from table2 where table1Id =@ITEM 

是否有可能选择Table1以及其他领域？

Answer 1

是可以肯定 -

DECLARE @item1 nvarchar(100) 
DECLARE @item2 nvarchar(200) 

select @item1 = <column1>, @item2 = <column2> from <table> 

PRINT @item1 
PRINT @item2 

Answer 2

当然，你的意思是这样的吗？

Select 
    @Item = table1Id, 
    @Item2 = table2.Column1, 
    @Item3 = table2.Column2 
From Table1 
Inner Join table2 on table1.table1Id = table2.table1Id 
... 

Answer 3

是的，你可以做多项选择，SELECT item1, item2 FROM table1等

Answer 4

如果我理解正确的话，那么，你可以指定多个值。

DECLARE @table1Id INT, 
     @fromdate DATETIME, 
     @todate DATETIME, 
     @name VARCHAR(20), 
     @link VARCHAR(20) 

SELECT @table1Id = table1Id 
     @fromdate = fromdate, 
     @todate = todate, 
     @name = name, 
     @link = link 
FROM table1 
WHERE table1.FromDate <= @ToDate 
AND  @FromDate <= table1.ToDate