dineshbalaji / helloword

just test application
0 stars 0 forks source link

Learn basic understanding from W3C school #1

Closed dineshbalaji closed 6 years ago

dineshbalaji commented 6 years ago

Focus on SQL Database topic and Close it once finish particular topic.

dineshbalaji commented 6 years ago

in - used with "where" to match with n number of values

Ex: select * from table1_name where col1 in (select col from talbe2_name);

on '' - provides conditional case like 'where' operator in 'table joining'.

table1 inner join table2 on conditions

as -

  1. used for provide alias name for table/column
  2. used with create procedure.
    1. used with create view
    2. create table from copy of another table
dineshbalaji commented 6 years ago

basic topic are covered and update in SQL folder