NULL In WHERE Clause Returns WHAT?!
STOP SCROLLING! Using NULL in WHERE clause creates something impossible! WHERE col = NULL returns ZERO rows. This breaks all logic! Watch now!
#sql #sqltricks #database #sqltutorial #nullwhere #sqlquiz #codingchallenge #sqlshorts #sqlbugs #whereclause #sqlwtf #hiddenbehavior
Correlated Subquery in WHERE?!
Correlated subqueries in WHERE execute for EVERY row! They reference outer query columns, creating a performance nightmare. This is why queries are slow!
#sql #sqltricks #correlatedsubquery #whereclause #performance #sqlweird #sqlquiz #codingchallenge #sqlshorts #sqlwtf #subqueries #advancedsql
PrecisionSQL
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