Use of joins in SQL

Source: Internet
Author: User
Tags joins

According to some material on the network to get:

Left JOIN connection (left join)
SELECT * FROM table1 LEFT join Tbale2 on Table1.id=table2.id
This SQL statement returns the result table1 the data in the table returns all the data in the Table2 table returns only those that satisfy the Where condition

Right link
SELECT * FROM table1 right join table2 on Table1.id=table2.id
This SQL statement returns the result table2 the data in the table returns all the data in the Table1 table returns only those that satisfy the Where condition

(insert join)
SELECT * FROM table1 inner JOIN table2 on table1.id = table2.id
This SQL statement returns results that show data that satisfies the criteria and does not use who is the primary table

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Use of joins in SQL

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