How do you have a subquery in the alias definition of a column (in the AS statement)

Question

Creating an alias for a result in a query is no problem

select VALUE as ALIAS from TABLE 

But what if I want the alias to be dynamic? My first thought would be to have a subquery in the AS statement, but SQL hates it apparently.

select VALUE1 as (select VALUE2 from TABLE2 where A=B) from TABLE1

This throws an error:

.Incorrect syntax near '('.

Answer 1

first, aliases are just names they lives until query running. its useful when writing long complex queries and also if you have long ugly table names you can use alias for that. you can use AS or just simply table_name alias but you can't use as for set sub-queries.