oracle与sqlsever的区别

记录&日常2023-12-09 12:08

oracle与sqlsever的区别

区别一

sql 复制代码

oracle字符之间连接用||
sqlserver字符之间连接用+

区别二

sql 复制代码

oracle字段重命名用as
sqlserver字段重命名用=

区别三

sql 复制代码

oracle判空用nvl
sqlserver判空用isnull

区别四

sql 复制代码

oracle多列合并成一列
select 
assid,
LISTAGG(name,' ') within group  (order by name ) as assconbilename 
from temp_gl_fzhs_view
group by assid

sqlsever多列合并成一列
SELECT 
assid,
assconbilename((select ','+name FROM temp_gl_fzhs_view WHERE assid = fz.assid for xml path('')),1,1,'') 
FROM  temp_gl_fzhs_view fz
group by assid