I have a SQL query like :
SELECT * FROM database1.table WHERE "_CONDITIONS"
UNION
SELECT * FROM database2.table WHERE "_CONDITIONS"
With this query, I retrieve datas from table
in database1
and database2
. Table
is exactly the same for each database.
I put the result into a php variable (big array), but how can I know if a result is from database1
or database2
? How can i add something in SQL for do that ?
Don't use union
, unless you want to remove duplicates. Use union all
. And then just add a column:
SELECT t.*, 1 as which FROM database1.table t WHERE "_CONDITIONS"
UNION ALL
SELECT t.*, 2 as which FROM database2.table t WHERE "_CONDITIONS";
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