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      Drop Tables

      MySQL Tutorial

      This SQL tutorial is structured for beginners to guide them from the foundational concepts to advanced data manipulation and querying techniques in SQL. By the end of this tutorial, you will have developed a robust understanding of SQL, equipping you with the knowledge to efficiently manage and analyze data across various database systems. This guide sets the stage for your growth into a skilled data professional, ready to tackle complex data challenges and contribute to the field of data analysis and database management.

       DROP TABLE Statement

      MySQL DROP TABLE Statement

      You can drop/delete an existing table using the DROP TABLE Statement. Once you delete a table all records, triggers, constraints and permission of the table are lost.

      Syntax

      Following is the syntax of the DROP TABLE statement 
      DROP TABLE [IF EXISTS] table_name ...
      Where, table_name is the name of the table you need to delete.

      Example

      Suppose we have created tables as shown below 
      CREATE TABLE TestTable1(value VARCHAR(10));
      CREATE TABLE TestTable2(value VARCHAR(10));
      CREATE TABLE TestTable3(value VARCHAR(10));
      CREATE TABLE TestTable4(value VARCHAR(10));
      If you verify the list of tables you can observe the created ones in the list as follows 
      show tables;

      Output

      Following is the output of the above query
      Tables_in_sample
      employee
      sample
      test
      testtable1
      testtable2
      testtable3
      testtable4
      You can delete three of the above created tables using the DROP TABLE statement as shown below 
      DROP TABLE testtable1; 
      DROP TABLE testtable2;
      DROP TABLE testtable3;
      Once a table is dropped, if you verify the list of the tables as shown below you can see its name is missing 
      show tables;

      Output

      The above mysql query generates the following output
      Tables_in_sample
      employee
      sample
      test
      testtable4

      The IF EXISTS clause

      If you try to drop a table that doesn’t exist error will be generated as shown below 
      DROP TABLE demo;
      ERROR 1051 (42S02): Unknown table 'sample.demo'
      If you use the IF EXISTS clause along with the DROP TABLE statement as shown below, the specified table will be dropped and if a table with the given name, doesn’t exist the query will be ignored.
      DROP TABLE IF EXISTS demo;