This blog explains the SQL clauses like WHERE, HAVING, ORDER BY, GROUP BY, and other related clauses using real-life examples with the employees and departments tables.
The WHERE clause lets you filter records based on specified conditions.
The GROUP BY clause is used to group rows with same values into summary rows.
The HAVING clause is used to filter groups created by GROUP BY clause after the aggregation.
The ORDER BY clause is used to sort the result set by one or more columns.
The LIMIT clause is used to specify the number of records to return from the result set.
The DISTINCT clause is used to return only distinct values, removing duplicates from the result set.
The AND, OR, and NOT operators are used to combine multiple conditions in the WHERE clause.
The AND operator combines the conditions where all conditions must be true.
The OR operator is used when only one of the conditions must be true.