KwickClips Databases and SQL · 37 sec · free
Can a DROP be undone?
Short answer. No. DDL saves at once.
What should you do before a DROP?
Take a backup.
Remember
| DROP has no undo |
| Back up before you DROP |
Which S Q L command can wipe a whole school in one second? Drop table deletes the table and its rows. Drop database deletes every table. No undo. Drop has no undo. Always back up first.
This clip is from the full lesson: SQL Data Definition: CREATE DATABASE, CREATE TABLE, ALTER and DROP — 6 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 10 Information Technology (402), CBSE Class 10 Information Technology (402), CBSE Class 12 Computer Science (083), CBSE Class 11 Informatics Practices (065)
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