In this repository i learned and worked out the topics about 1.Select

2.Constraint a.using WHERE clause to give condition b.operators:LIKE,NOT LIKE,%,_,=,!=,IN(..),NOT IN(..)

3.Filtering & Sorting a.ORDERBY ASEC,DESC b.GROUPBY

4.Joins a.inner joins b.outer joins c.left joins d.right joins

5.Null a.IS NULL B.IS NOT NULL