如何顯示每2行到單列如何從表
表
Rowid batch maker checker date
1 101 john null 4feb
2 101 john raja 4feb
3 101 john null 5feb
4 101 john raja 6feb
5 101 john null 9feb
預期輸出
Batch maker checker
101 john raja -- 1st and 2nd row
101 john raja -- 3rd and 4th row
101 john null -- 5th row only
另外表將爲n nunber得到各2行到單列的列
如何查詢將每兩行合併爲單行
SELECT * FROM Players WHERE id % 2 = 0
你可以像這樣的東西
select coalesce(t2.batch, t1.batch),
coalesce(t2.maker, t1.maker),
coalesce(t2.checker, t1.checker)
from table t1
left join
table t2
on t1.id + 1 = t2.id and
t1.id % 2 = 1
奇數行嘗試將下面的人來參加，如果他們存在。如果存在，則從偶數行中選擇列，否則從奇數列中選擇。
如果t1和t2行都存在，那麼這些合併將會導致結果上升。 – jarlh
的確如此，但我認爲數據將遵循所提供的模式OP。 –
嘗試這樣的：
DECLARE @Table TABLE (Rowid int,batch varchar(100),maker varchar(100),checker varchar(100),date varchar(100))
DECLARE @Table1 TABLE (batch varchar(100),maker varchar(100),checker varchar(100))
INSERT INTO @Table
SELECT 1,101,'john',null,'4feb' UNION ALL
SELECT 2,101,'john','raja','4feb' UNION ALL
SELECT 3,101,'john',null,'5feb' UNION ALL
SELECT 4,101,'john','raja','6feb' UNION ALL
SELECT 5,101,'john',null,'9feb'
DECLARE @i INT=1,@RowId INT
WHILE @i<=(SELECT COUNT(*) FROM @Table)
BEGIN
SELECT @RowId= CASE WHEN ISNULL(checker,'0')='0' THEN @i+1 ELSE @i END FROM @Table WHERE [email protected]
INSERT INTO @Table1 SELECT batch,maker,checker FROM @Table WHERE [email protected]
IF @@ROWCOUNT=0
INSERT INTO @Table1 SELECT batch,maker,checker FROM @Table WHERE [email protected]
SET @[email protected]+2
END
SELECT * FROM @Table1
奇數行和偶數行的聯合將只返回整個表 –
@StefanoZanini現在嘗試 –
試試這個，
DECLARE @Table TABLE (Rowid int,batch varchar(100),maker varchar(100)
,checker varchar(100),date varchar(100))
INSERT INTO @Table
SELECT 1,101,'john',null,'4feb' UNION ALL
SELECT 2,101,'john','raja','4feb' UNION ALL
SELECT 3,101,'john',null,'5feb' UNION ALL
SELECT 4,101,'john','raja','6feb' UNION ALL
SELECT 5,101,'john',null,'9feb'
select Batch, maker, checker from @Table
where Rowid %(2)=0
union ALL
select Batch, maker, checker from @Table a
where Rowid %(2)=1
and not exists(select * from @Table b
where b.Rowid>a.Rowid and Rowid %(2)=0)
自外連接。 – jarlh
刪除某些行後，RowId最有可能會出現空白。 'Row_number（）over（order by rowid）'會給你提供可靠的序列來與'％2'一起使用 – Serg
如果要合併的兩行具有不同的批量值，該怎麼辦？ – jarlh