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show only records not present in another table

Thread began 12/30/2010 4:53 pm by CraigR | Last modified 12/30/2010 6:01 pm by CraigR | 1075 views | 2 replies |

CraigRBeta Tester

show only records not present in another table

I have a list of events to which members can be invited

the table structure is as follows..




tbleventmember is my many-to-many table which allows any number of members to be at each event.

i have an 'add multiple members to an event page', which inserts rows to tbleventmember.

this works fine.

at present, the datasource for the add multiple page is simply tblmember

i would like to change this, so that for a specific eventid, my list shows only members in tblmember whose id is not present in tbleventmember.

can anyone suggest the simplest way of achieving this ?

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Jason ByrnesWebAssist

you would need to use a compound select statement:

SELECT * FROM tblmember WHERE tblmember.memberid IN (SELECT tbleventmember.memberid FROM tbleventmember WHERE tbleventmember.memberid != 2)

By using the IN key work, the first query is using the result set from the second query as it's source.

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CraigRBeta Tester


That's what I needed.

I managed it easily in the MSAccess GUI, but couldn't work it in MySQL,

Thanks again

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