Question
Which of the following commands is part of the
Transaction Control Language (TCL) in SQL?Solution
Transaction Control Language (TCL) commands in SQL are used to manage transactions in a database, ensuring that operations are executed reliably. COMMIT is a TCL command that finalizes a transaction, making all its changes permanent in the database. For example, in a banking application, if a transaction involves debiting one account and crediting another, the COMMIT command ensures these changes are saved only when both operations succeed. This guarantees data integrity. Without TCL commands like COMMIT, rollback mechanisms would not work effectively, and transactional integrity could be compromised. Why Other Options Are Incorrect :
- SELECT : This is a Data Query Language (DQL) command used for retrieving data, not managing transactions.
- UPDATE : This is a Data Manipulation Language (DML) command used to modify data, not a TCL command.
- ALTER : This is a Data Definition Language (DDL) command used for modifying table structures, unrelated to transactions.
- DROP : Another DDL command, used for deleting database objects, not for controlling transactions.
Statements:
All Letters are Alphabets
Only few Letters are Numbers
All Digits are Alphabets
Conclusion:
I. Some L...
In the question below there are two conclusions followed by three statements in the options. You have to take the three given statements to be true eve...
Statements:
Some children are parents.
All parents are infants.
Some infants are adolescent.
Conclusions:
I. At least...
Statements:
Only a few Objectives are Solutions.
Only Subjective are Information.
A few Subjective are Solutions.
Conclusion...
Statements:
All ribbons are mat.
Some mats are ropes.
No rope is a thread.
All thread is a needle.
...
Three statements are given followed by two conclusions numbered I & II. Assuming the statements to be true, even if they seem to be at variance with co...
Statement:
No blue is black.
Only a few blacks are Whites.
All Whites are grey.
Conclusion:
I. No blue is Whites.
II. Some grey are not blues
Some tablets are medicines. Some syrups are not capsules. Some tablets are not syrups.
Statements: Some sweaters are coats.
      All coats are shawls. Â
Conclusions: I. Some sweaters are shawls.
   ...
Statements:
All Swabs are Handles.
Only a few Handles are Sticks.
All Sticks are Containers.
Conclusions:
I. Some Swabs are Sticks
II. No Swab is a Stick
