Sql Sybase在(分区)上稠密_秩()的替代方案
我有一个下面的SQL查询,需要将其转换为SybaseSql Sybase在(分区)上稠密_秩()的替代方案,sql,sap-ase,window-functions,Sql,Sap Ase,Window Functions,我有一个下面的SQL查询,需要将其转换为Sybase SELECT prd_name, DENSE_RANK() OVER (PARTITION BY prd_cat ORDER BY createddt) FROM product 表脚本: CREATE table product(prd_name varchar(10), prd_cat varchar(10), createddt datetime)
SELECT prd_name, DENSE_RANK() OVER (PARTITION BY prd_cat ORDER BY createddt) FROM product
表脚本:
CREATE table product(prd_name varchar(10),
prd_cat varchar(10),
createddt datetime)
INSERT INTO product values('Product 1', 'Toy', CONVERT(DATE,'2017-05-30'))
INSERT INTO product values('Product 2', 'Toy', CONVERT(DATE,'2017-05-31'))
INSERT INTO product values('Product 3', 'Toy', CONVERT(DATE,'2017-05-31'))
INSERT INTO product values('Product 4', 'Toy1', CONVERT(DATE,'2017-05-29'))
版本:Adaptive Server Enterprise/15.7Sybase的某些版本支持窗口功能。我假设您没有这样的版本 您可以将其替换为相关子查询:
SELECT p.prd_name,
(SELECT COUNT(DISTINCT createddt)
FROM product p2
WHERE p2.prd_cat = p.prd_cat AND p2.createddt < p.createddt
)
FROM product p;
戈登,谢谢你的快速回复。我的问题马上就解决了