TCL Full Form: Applications & Advantages

The TCL stands for Transaction Control Languages, which are used by Database administrators as TCL commands to manage and control transactions held in a database. 

• The main aim for TCL is to maintain consistency.
• TCL helps the user to manage and maintain transactions by changing the DML commands. 
• Moreover, it helps the statements to get grouped into logical transactions.

Key terms: TCL, TCL Commands, Commit, Savepoint, Rollback, SQL, Delete, Insert, Update, DVD,PC

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History of TCL

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In 1985 the businesses were established and registered as TCL Telecommunication Equipment Co Ltd. 

• It started producing consumer electronics for the Chinese market and by the 2000s it started its operation abroad. 
• TCL was founded as a joint venture with a number of investors from Hong Kong.
• In Nov 2003, TCL and Thomson SA of France announced the formation of a joint venture to manufacture televisions and DVD players globally.

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Applications of TCL

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There are following applications of TCL:

• Committing Transactions: These are used to commit the transaction, which means to permanently save the changes to the transaction to the database.
• Rolling Back Transactions: These are used to roll back the transactions which means to undo the changes made during the transaction and restore it to its original estate.
• Setting Transaction Isolation Levels: It is used to set the transaction isolation level, which determines the level of concurrency.
• Savepoints: It can be used to set save points within a transaction for a partial rollback.
• Managing Transactions in Stored Procedures: These are used to store procedures to manage transactions within the scope of the procedure.

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Advantages of TCL

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There are following advantages of TCL:

• It is used as SQL (Structured Query Language), which is portable, interactive and works in multiple programs of PC, servers, and laptops.
• It can easily edit, access, and save changes to the database.
• The coding is not very complex.

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Disadvantages of TCL

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There are following disadvantages of TCL:

• The ROLLBACK command is of no use if a COMMIT command is used by the user.
• The SAVEPOINT can be confusing for new users.

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TCL Commands

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There are following commands in TCL:

COMMIT

These are used to save the data permanently, there are commands like INSERT, DELETE or UPDATE which are used to rollback if the data is not stored permanently.

Syntax: commit;

ROLLBACK

These are used to get the data or restore the data to its last save point or last committed state. If the data is deleted or updated or incorrectly mentioned it could go back to its original estate, if savepoint is not done.

Syntax: rollback;

SAVEPOINT

These are used to save the data at a particular point temporarily.

Syntax: Savepoint A;

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Operation of TCL technology

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There are five business divisions of TCL such as:

• Multimedia: TVs
• MIFI devices for communication and Mobile phones
• Home appliances
• Consumer electronics and home electronics
• Semiconductor Display and Materials

By 2021, TCL has 28 research and development (R&D) groups, out of which 10 joint labs, and 22 manufacturing facilities. TCL has a research laboratory of its own, in Shenzhen.

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Things to Remember

• TCL stands for Transaction Control Languages that are used by Database administrators.
• The main aim for TCL is to maintain consistency.
• The applications of TCL include: Committing Transactions, Rolling Back Transactions.
• Setting Transaction Isolation Levels Savepoints and Managing Transactions in Stored Procedures.
• TCL are used to commit the transaction, which means to permanently save the changes to the transaction to the database.
• Rollbacks are used to get the data or restore the data to its last save point or last committed state. 
• Commit are used to save the data permanently, there are commands like INSERT, DELETE or UPDATE 

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