lazarus - How to apply multiple filters on TSQLQuery -

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singular filter on column works, example:

sqlquery.filter := 'columnname="some_filtered_text"'; // ok

but how apply filter many columns?

for example doesn't work:

sqlquery.filter := 'columnname1="some_filtered_text1",     columnname2="some_filtered_text2"'; // exception

it raises exception: "tapplication.handleexception operator/function missing".


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