Where Clause in SQL

The WHERE clause in SQL is used to filter rows from a table based on specified conditions. It is applied before any grouping (using GROUP BY) or aggregation (using functions like SUM, COUNT, etc.). Conditions in the WHERE clause are used to test each row against a predicate expression. Rows that satisfy the condition are included in the result set returned by the query. Common operators used in WHERE clauses include =, <>, <, >, <=, >=, LIKE, IN, BETWEEN, and AND / OR for combining multiple conditions. The WHERE clause helps retrieve specific data from a table based on defined criteria.