SQL Commands With Example (Image by - Sharma Guides | Subham232330) ALTER TABLE ALTER TABLE lets you add columns to a table in a database. ALTER TABLE table_name ADD column_name datatype; AND AND is an operator that combines two conditions. Both conditions must be true for the row to be included in the result set. SELECT column_name(s) FROM table_name WHERE column_1 = value_1 AND column_2 = value_2; WITH WITH clause lets you store the result of a query in a temporary table using an alias. You can also define multiple temporary tables using a comma and with one instance of the WITH keyword. WITH temporary_name AS ( SELECT FROM table_name) SELECT * FROM temporary_name WHERE column_name operator value; WHERE WHERE is a clause that indicates you want to filter the result set to include only rows where the following condition is true. SELECT column_name(s) FROM table_name WHERE column_name operator value; SELECT DISTINCT SELECT DISTINCT s...