What are the TCL commands in SQL?
Table of Contents
What are the TCL commands in SQL?
The TCL commands are: COMMIT. ROLLBACK. SAVEPOINT.
Which commands comes under TCL?
TCL commands deal with the transaction within the database….List of TCL commands:
- COMMIT: Commits a Transaction.
- ROLLBACK: Rollbacks a transaction in case of any error occurs.
- SAVEPOINT:Sets a savepoint within a transaction.
- SET TRANSACTION: Specify characteristics for the transaction.
What is TCL used for in SQL?
TCL (Transaction Control Language) : Transaction Control Language commands are used to manage transactions in the database. These are used to manage the changes made by DML-statements. It also allows statements to be grouped together into logical transactions.
What TCL statements are available in Oracle?
The TCL commands in Oracle SQL are:
- COMMIT: saves any changes made to the database.
- ROLLBACK: undoes any changes made to the database.
- SAVEPOINT: creates a point in your transaction to which you can roll back to.
- SET TRANSACTION: Sets different options for your transaction, such as isolation level.
What is TCL code?
Tcl (pronounced “tickle” or as an initialism) is a high-level, general-purpose, interpreted, dynamic programming language. It was designed with the goal of being very simple but powerful. Tcl casts everything into the mold of a command, even programming constructs like variable assignment and procedure definition.
What are TCL commands explain with examples?
Use some SQL queries on the above table and then watch the results
| Rollback | Commit | |
|---|---|---|
| 1. | Database can be restored to the last committed state | Saves modification made by DML Commands and it permanently saves the transaction. |
| 2. | Syntax- ROLLBACK [To SAVEPOINT_NAME]; | Syntax- COMMIT; |
| 3. | Example- ROLLBACK Insert3; | Example- SQL> COMMIT; |
What is full form of TCL?
TCL Technology (originally an abbreviation for Telephone Communication Limited) is a Chinese electronics company headquartered in Huizhou, Guangdong Province.
What is TCL example?
TCL is string based scripting language and also a procedural language. The language is commonly used for GUIs and testing. In TCL by default everything is string. TCL is shell application that reads TCL command from its standard input or from a file and gives desired results.
What is TCL interpreter?
What is Tcl coding?
Tool command language (Tcl) is a powerful scripting language with programming features. It is available across Unix, Windows and Mac OS platforms. Tcl is used for Web and desktop applications, networking, administration, testing, rapid prototyping, scripted applications and graphical user interfaces (GUI).
What is Tcl code?
What is difference between TCL and DCL?
DCL is abbreviation of Data Control Language. It is used to create roles, permissions, and referential integrity as well it is used to control access to database by securing it. TCL is abbreviation of Transactional Control Language. It is used to manage different transactions occurring within a database.
