Selecting columns in SQL
I have two tables and the following query:
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
Is it possible to select the other fields from Table1
as well?开发者_JAVA技巧
Yes surely possible -
DECLARE @item1 nvarchar(100)
DECLARE @item2 nvarchar(200)
select @item1 = <column1>, @item2 = <column2> from <table>
PRINT @item1
PRINT @item2
Sure, do you mean something like this?
Select
@Item = table1Id,
@Item2 = table2.Column1,
@Item3 = table2.Column2
From Table1
Inner Join table2 on table1.table1Id = table2.table1Id
...
Yes, you can do multiple selections, SELECT item1, item2 FROM table1
etc.
If I understand you correctly, then yes, you can assign multiple values.
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
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