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SQL Filtering and Sorting with Real-life Examples

  • 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.

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