SQL DROP Table, DROP Index, and DROP Database Statements Explained with Examples

The SQL DROP statement is a command that deletes existing database components or the entire databases with all their data permanently. There are other SQL commands with a similar effect (TRUNCATE or DELETE), but the specificity of the DROP command is that it deletes everything at once. For instance, DROP TABLE removes the table data, indexes, triggers, permissions, constraints – the entire schema of the table.

The DROP statement requires one to be extremely careful when using it. Once performed, it can’t be rolled back. The information is lost for good. The only chance to return the data will be to restore a backup. Still, in many cases, we have to apply DROP statements. This article will focus on such cases, the specific DROP variants, and how to use them safely.

CodingSight - SQL DROP Index, DROP Table, and DROP Database Statements Explained with Examples
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SQL DROP TABLE Statement and Various Use Cases

The SQL DROP TABLE statement serves to drop the table from the database. It removes the table and its data and indexes associated with it. The statement is irreversible. Thus, you can restore the table only by restoring the backup.

This article covers the following cases:

  1. Delete one or multiple tables.
  2. Delete the table used in a View.
  3. Delete the table having a foreign key.
  4. Delete the table having clustered and non-clustered indexes.
  5. Delete the table from the replication setup.
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