Answer / malli.gontla

suppose u have one table which is in database. The table
contains some records. U want to modify one record of table.
after modification, u don't want that new values for
the record. just u use rollback command. previous values are
placed in database.

Example:
Case 1: Roll Back
sno name palce
1 abc hyderabad
2 xyz bangalore.

This is the table and it contains some records.
Suppose if u want change the 2nd record, means palce
is changed to chennai.

After modification:
sno name palce
1 abc hyderabad
2 xyz Chennai.

Suppose if u want old values, means u don't want new
values. At that time u use roll back command

After useing rollback:
sno name palce
1 abc hyderabad
2 xyz bangalore.
after using roll back, the records are comes like
above(original records)

Case 2: Commit
sno name palce
1 abc hyderabad
2 xyz bangalore.

This is the table and it contains some records.
Suppose if u want change the 2nd record, means palce
is changed to chennai.

After modification:
sno name palce
1 abc hyderabad
2 xyz Chennai.

After useing commit:
sno name palce
1 abc hyderabad
2 xyz Chennai.
after using commit, the table is finilased.u can't get
old values by uisng roll back.

Once if u use commit,u can't get old values for using of
rollback. Before commit, u can get old values for rollback.

Answer / prasad

Commit mean if change the values after commit u cont replace
old values.

Rollback mean if u r not given commit u will get previous
values.

Answer / kaushal

Using commit, It saves any modification made within objects of database. We can not undo our transaction which done within commit.
Rollback is similar to undo button of any s/w browser. That is, when we make any changes in recodes of table, we can came back to previous form of that table by using rollback.

Answer / priyanka

COMMIT:Save Record Permanently in database
Syntax :COMMIT;
ROLLBACK: This is like undo
Syntax: ROLLBACK

Answer / ashish kumar

If transaction manager not found any unchecked exception then record is committed.If transaction manager found any unchecked exception then rollback.

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