“ WHERE” 2附近的SQL语法错误

Question

Query:

select distinct R1.name, R2.name
from (
    (
    select Ra.mID mID, Re.rID rID, Re.name name
    from Rating Ra join Reviewer Re using (rID)
    ) R1
    ,
    (
    select Ra.mID mID, Re.rID rID, Re.name name
    from Rating Ra join Reviewer Re using (rID)
    ) R2
where R1.mID = R2.mID and R1.rID > R2.rID;

Result:

Query failed to execute: near "where": syntax error

I am guessing the problem has something to do with the pointer variables in the FROM clause that are referred to in the WHERE clause, but I can't figure it out. I haven't been very wary of my WHEREs recently...

Answer 1

There is a mismatch in the number of opening and closing brackets in the provided SQL.

There may also be other issues, but that's less clear without knowing what db server / version you are running.

Answer 2

Check your php version as your query is perfect. It may possible because some php version is not supporting sub query.