Answers for "sql if then delete"

SQL
0

delete rows in sql with condition

DELETE FROM table_name WHERE condition;

// E.g.
DELETE FROM Customer WHERE Age > 65;
DELETE FROM Customer WHERE Age > 65 AND Name = 'XYZ';
Posted by: Guest on April-16-2021
3

SQL DELETE-Klausel

Mit DELETE werden einzelne oder mehrere Datensätze gelöscht. Mit WHERE 
werden nur bestimmte Datensätez gelöscht. 

  DELETE FROM suppliers
  WHERE 
      supplier_name = 'Microsoft';
Posted by: Guest on December-18-2020
4

what is delete in sql

DELETE -
-DML COMMAND
-Delete Rows from the table one by one
-We can use where clause with Delete to delete single row
-Delete is slower than truncate
-ROLLBACK is possible with DELETE

DROP-
-DDL COMMAND
-Delete the entire structure or schema
-We can't use where clause with drop
-Drop is slower than DELETE & TRUNCATE
-ROLLBACK IS NOT POSSIBLE WITH DROP

TRUNCATE-
-DDL COMMAND
-Truncate deletes rows at a one goal
-We can't use where clause with Truncate
-Truncate faster than both DELETE & DROP
-Rollback is not possible with Truncate
Posted by: Guest on December-14-2020

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