Joins in SQL table are used to combine the data present in two different tables and display the result in a single table. The table which displays the result of join is temporary; the resultant table will be based on the comparison of columns between the tables. The effectiveness of joins are based on the […]
What is Self Join?
The process of joining two sets of data present in a table and displaying the resultant data in a new table is called as self join. If a data present in a table has NULL value, it will be omitted in the resultant table. A duplicate copy of a table will be created before a […]