SQL join is a technique used to combine two or more tables data by using a common column or key. It allows you to retrieve data from multiple tables based…
INNER JOIN(or JOIN) returns only the matching rows between two tables. By default 'JOIN' keyword is treated as 'INNER JOIN'.
LEFT JOIN (or LEFT OUTER JOIN) returns all the rows from the left table and the matching rows from the right table. If there is no match, the result will …
RIGHT JOIN (or RIGHT OUTER JOIN) returns all the rows from the right table and the matching rows from the left table. If there is no match, the result wil…
FULL JOIN (or FULL OUTER JOIN) returns all the rows from both tables, with null values for the columns that do not have a match in the other table.
CROSS JOIN combines each row from one table with every row from another table. Typically, it is used to generate all possible combinations of rows from tw…
SELF JOIN is the type of join, where a table is joined with itself as if it were two separate tables. It is useful where a table contains hierarchical dat…
You can use "INSERT INTO" with "SELECT" statement to copy or transfer data between SQL tables.
To insert data into an existing SQL table, you can use "INSERT INTO" statement which insert new rows of data into an existing table.
SQL clause is the specific part of a SQL statement which is used to perform various operations. It is used to filter, retrieve, group, sort, join and mani…