explain in depth about UPDATE command
Answers
Defination of Update Command
UPDATE Command is used to update any record of data in a table.
The UPDATE statement is a Structured Query Language (SQL) statement used to change or update values in a table.
It is usually suffixed with a WHERE clause to restrict the change to a set of values that meet a specific set of criteria.
UPDATE table_name SET column_name = new_value WHERE some_condition;
WHERE is used to add a condition to any SQL query.
Details according to SQL
An SQL UPDATE statement changes the data of one or more records in a table. Either all the rows can be updated, or a subset may be chosen using a condition.
UPDATE table_name SET column_name = value [, column_name = value ...]
Function of SQL Command
An UPDATE statement is used to directly change or modify the values stored in one or more fields in a specified record in a single table.
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