SQL Server-在子查询中使用列别名
我有以下查询,它可以与MySQL配合使用,但拒绝与SQL server配合使用:SQL Server-在子查询中使用列别名,sql,sql-server,nested,Sql,Sql Server,Nested,我有以下查询,它可以与MySQL配合使用,但拒绝与SQL server配合使用: SELECT table1.someField AS theField, COUNT(table2.someField) / (SELECT COUNT(someField) FROM table1 WHERE someField = theField), FROM table1 LEFT JOIN table2 ON table1.someField = table2.someField SQL
SELECT table1.someField AS theField,
COUNT(table2.someField) / (SELECT COUNT(someField) FROM table1 WHERE someField = theField),
FROM table1 LEFT JOIN table2 ON table1.someField = table2.someField
SQL Server似乎不喜欢子查询中的别名。有人告诉我需要使用CTE,但我以前从未使用过。这是否正确?问题很可能在于子查询中的混乱
SELECT COUNT(someField) FROM table1 WHERE someField = theField
条件中的someField
将是本地的-但您可以访问表1。someField也一样
怎么样
SELECT COUNT(t3.someField) FROM table1 t3 WHERE t3.someField = table1.someField
?问题很可能在于子查询中的混乱
SELECT COUNT(someField) FROM table1 WHERE someField = theField
条件中的someField
将是本地的-但您可以访问表1。someField也一样
怎么样
SELECT COUNT(t3.someField) FROM table1 t3 WHERE t3.someField = table1.someField
?