Which of the following code will remove all the rows from the table LOCATIONS?
TRUNCATE TABLE LOCATIONS
This question asks to identify the SQL command specifically designed to remove all rows from a table named LOCATIONS.
Let's analyze the options provided:
DROP TABLE LOCATIONSDROP TABLE command is used to delete the entire table structure, including all the data within it and the table definition itself. It's a more drastic action than just removing rows.DELETE TABLE LOCATIONSDELETE statement in SQL is used to remove rows, but the syntax is DELETE FROM table_name WHERE condition. There is no DELETE TABLE command.TRUNCATE TABLE LOCATIONSTRUNCATE TABLE command is specifically designed to remove all rows from a table very efficiently. It deletes all records but keeps the table structure intact. It's generally faster than using DELETE without a WHERE clause for removing all rows.None of theseTRUNCATE TABLE LOCATIONS is a valid and correct command for the task, this option is incorrect.It's important to understand the differences between common SQL commands used for table data manipulation:
DELETE: Removes rows based on a condition (or all rows if no condition is specified). It is a DML (Data Manipulation Language) command, logs each row deletion, and can be rolled back.TRUNCATE: Removes all rows from a table quickly. It is a DDL (Data Definition Language) command, minimally logs the operation (often just deallocating data pages), is faster than DELETE for large tables, and typically cannot be rolled back easily (depending on the database system). It also resets identity columns.DROP: Removes the entire table structure and data. It is a DDL command.Therefore, the command that specifically removes all rows from the LOCATIONS table is TRUNCATE TABLE LOCATIONS.
Which of the following best describes the main function of Unicode?
What is the full form of BASIC in context of the BASIC computer language?
Which of the following is a correct statement?
Assume that the 8255 gets selected whenever A15 - A11 are high during I/O read or write cycles. The A2 and A1 are connected to A1 and A0 of 8255 chip, then the address for port C of 8255 is
(a) FEh
(b) 03h
(c) FF03h
(d) FFh
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