troubleshooting Question

MYSQL QUERY - if another column is true in the query

Avatar of Steve Tinsley
Steve TinsleyFlag for United Kingdom of Great Britain and Northern Ireland asked on
MySQL ServerSQL
9 Comments1 Solution84 ViewsLast Modified:
I have a query which pulls out data from a booking database.
It lists all the possible booking options as well and if the user has booked it.

The booking options have a topicID column, some options have the same topicID and cannot be booked twice.

I want to be able to add a column to my query which shows if the user has booked each topic... Perhaps by adding a topicBooked True/False column.

Current query example:
SELECT gb.* , bo.*, gb.bookingGroupId,
EXISTS ( SELECT * FROM user_bookingOption ubo WHERE bo.bookingOptionID =  ubo.bookingOptionID AND ubo.userId = 2112) as userHasBooked
FROM bookingGroup gb
LEFT JOIN bookingOption bo ON (gb.bookingGroupId = bo.bookingGroupId)

For each row I need to ask has there been an option booked with the same topic number in this query.

Any help would be much appreciated.
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