----- Original Message ----- From: Rik Hoekstra <rik.hoekstra@inghist.nl> To: <zope@zope.org> Sent: Wednesday, March 29, 2000 10:55 AM Subject: [Zope] testing for existence of value in SQLtable
Is there an easy way to test whether a value exists in a SQL table, so that I can do something like this in a ZSQL Method:
<dtml-if> [here follows the test for the existence of a value in a table] insert items into table </dtml-else> update item in table </dtml-if>
This problem probably came along before on the lists, but I can't find it anymore...
Rik
Try using a COUNT in your SQL select formula. e.g. Select count(colname) from tablename where colname='myvalue'; If it returns a 0 then that value doesn't exist. If it returns anything then that is the number of times the value exists.
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