Sql 在派生表中执行包含ORDERBY子句的自定义排序
我面临着一个复杂的情况,我知道可以解决这个问题的方法,但是派生表中的ORDERBY子句弄乱了自定义排序。以下是我的输入和输出详细信息以及我尝试过的内容 模式:- 输入:-Sql 在派生表中执行包含ORDERBY子句的自定义排序,sql,sql-server,tsql,Sql,Sql Server,Tsql,我面临着一个复杂的情况,我知道可以解决这个问题的方法,但是派生表中的ORDERBY子句弄乱了自定义排序。以下是我的输入和输出详细信息以及我尝试过的内容 模式:- 输入:- CREATE TABLE Test( Rowname VARCHAR(10), Col1 DATETIME, Col2 DATETIME, Col3 DATETIME, Col4 DATETIME ); INSERT INTO Test VALUES( 'Row1', '2016-01-14', '2016-
CREATE TABLE Test( Rowname VARCHAR(10), Col1 DATETIME, Col2 DATETIME, Col3 DATETIME, Col4 DATETIME );
INSERT INTO Test VALUES( 'Row1', '2016-01-14', '2016-01-08', '2016-01-30', '2016-01-01' );
INSERT INTO Test VALUES( 'Row2', '2016-01-02', '2016-01-01', '2016-01-18', '2016-01-15' );
RowName Result
Row1 Col4,Col2,Col1,Col3
Row2 Col2,Col1,Col4,Col3
预期输出:-
CREATE TABLE Test( Rowname VARCHAR(10), Col1 DATETIME, Col2 DATETIME, Col3 DATETIME, Col4 DATETIME );
INSERT INTO Test VALUES( 'Row1', '2016-01-14', '2016-01-08', '2016-01-30', '2016-01-01' );
INSERT INTO Test VALUES( 'Row2', '2016-01-02', '2016-01-01', '2016-01-18', '2016-01-15' );
RowName Result
Row1 Col4,Col2,Col1,Col3
Row2 Col2,Col1,Col4,Col3
我试过什么?
WITH CTE(RowName,Colmn,RN) AS
(
SELECT RowName,Colmn,ROW_NUMBER() OVER( PARTITION BY RowName ORDER BY RowName ) AS RN
FROM
(
( SELECT RowName,Col1 AS Col,'Col1' AS Colmn FROM Test )
UNION ALL
( SELECT RowName,Col2 AS Col,'Col2' AS Colmn FROM Test )
UNION ALL
( SELECT RowName,Col3 AS Col,'Col3' AS Colmn FROM Test )
UNION ALL
( SELECT RowName,Col4 AS Col,'Col4' AS Colmn FROM Test )
) Z
ORDER BY RowName,Col
)
SELECT RowName,
MAX( ( CASE WHEN RN = 1 THEN Colmn END ) ) + ',' +
MAX( ( CASE WHEN RN = 2 THEN Colmn END ) ) + ',' +
MAX( ( CASE WHEN RN = 3 THEN Colmn END ) ) + ',' +
MAX( ( CASE WHEN RN = 4 THEN Colmn END ) ) AS Result
FROM CTE
GROUP BY RowName;
注意:-
CREATE TABLE Test( Rowname VARCHAR(10), Col1 DATETIME, Col2 DATETIME, Col3 DATETIME, Col4 DATETIME );
INSERT INTO Test VALUES( 'Row1', '2016-01-14', '2016-01-08', '2016-01-30', '2016-01-01' );
INSERT INTO Test VALUES( 'Row2', '2016-01-02', '2016-01-01', '2016-01-18', '2016-01-15' );
RowName Result
Row1 Col4,Col2,Col1,Col3
Row2 Col2,Col1,Col4,Col3
内部查询/派生表中的ORDER BY RowName,Col子句失败,因为SQL Server中不允许该子句。如果到那时我还没有使用这个ORDER,我如何在不使用ORDER BY子句的情况下执行自定义排序?如果您在ORDER BY的行号中添加col,它将按照您想要的方式排序
ROW_NUMBER() OVER( PARTITION BY RowName ORDER BY RowName, col )
应在
over
子句中定义您的订购人
:
WITH CTE(RowName,Colmn,RN) AS
(
SELECT
RowName,Colmn,ROW_NUMBER() OVER(
PARTITION BY RowName
ORDER BY RowName, Col -- add Col here
) AS RN
FROM
(
( SELECT RowName,Col1 AS Col,'Col1' AS Colmn FROM Test )
UNION ALL
( SELECT RowName,Col2 AS Col,'Col2' AS Colmn FROM Test )
UNION ALL
( SELECT RowName,Col3 AS Col,'Col3' AS Colmn FROM Test )
UNION ALL
( SELECT RowName,Col4 AS Col,'Col4' AS Colmn FROM Test )
) Z
-- ORDER BY RowName,Col -- remove this line
)
SELECT RowName,
MAX( ( CASE WHEN RN = 1 THEN Colmn END ) ) + ',' +
MAX( ( CASE WHEN RN = 2 THEN Colmn END ) ) + ',' +
MAX( ( CASE WHEN RN = 3 THEN Colmn END ) ) + ',' +
MAX( ( CASE WHEN RN = 4 THEN Colmn END ) ) AS Result
FROM CTE
GROUP BY RowName;