Question

I have 2 table1 and table2

table1
id,desc

table2
id,t1_id,desc

how i can select row depending on desc=”something”

select * from table1 t1 
left join table2 t2 on t1.id=t2.t1_id 
where t1.desc='something'

there is data in table 1 having desc “something” but its returning nothing

i tried

where "desc"='something'

but giving

ambiguous column desc error.

how i can retrieve data from table 1 where desc=’something’ in postgreSQL

many thanks…

Answer 1

Use " to escape reserved keywords.

select * from table1 t1 
left join table2 t2 on t1.id=t2.t1_id 
where t1."desc"='something'

But don’t forget to add the table name or alias if a column is named equal in 2 tables. The DB engine does not know which one to take if you don’t specify the table.