The DROP is DDL(Data Definition Language and The DELETE is DML (data Manipulation Language) therefore the DELETE command can be rolled back, while DROP command can not be rolled back. This means that if there is a RETURNING clause, the rows returned by the statement probably will not be in the order specified by the ORDER BY clause. The order in which rows are deleted is arbitrary and is not influenced by the ORDER BY clause. Note: The delete command is used to delete a records from column.ĭROP Table command is used to delete a whole table. The ORDER BY clause on a DELETE statement is used only to determine which rows fall within the LIMIT. This query will delete table 'students' permanently. Iii) To delete table, the query should be written as: The TRUNCATE Command is DDL(Data Definition Language) therefore TRUNCATE TABLE statement is much faster than DELETE FROM Statement. This error is resolved by deleting the referenced constraints. Note: If the column contains constraints or other dependencies, an error message will be displayed. Another command is used to remove all rows from the table: This query will delete only records present in the table and not table. The query should be written as:ĭELETE FROM Students WHERE Stud_ID= To remove all rows, the query should be written as: Different possible ways to delete Statement Consider the following table Delete a row where Stud_ID = 2.
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