MSSQL/SQL Query condition error

Question

I have this 2 following SQL Queries on my grails controller:

def query1 = sql.rows("select abc from table_one where cond = 1")

The return result from query1 gives me [{abc=5}]

def query2 = sql.rows("select req from table_two where abc = " +query1)

I am having an error trying to run query2 and I have no idea why.

the column name abc exist in both table_one and table_two, I am trying to fetch the value of abc from table_one, whereby cond = 1, and assign it to variable query1.

and with query2, I am trying to get the values of req from table_two, whereby the value of abc in table_two is equals to the value of query1.

any help on this?

Error message from query2:

Message:Unclosed quotation mark after the character string '[abc:5]'.

Answer 1

You join the table using INNER JOIN

select  b.req
from    table_one a
        INNER JOIN table_two b
            ON a.abc = b.abc
where   a.cond = 1

the following syntax is ANSI SQL-92.