always stay on the right side
never text and drive
Do these questions have given answers already?
BASIC
(Beginners' All-purpose Symbolic Instruction Code)
ALTER TABLE customer ADD CONSTRAINT customer_number_unique UNIQUE (customer_number);
Structured Query Language databases find the name and department name of all graduate students who work on projects that do not employ any other graduates from their department.
Explanation:
Structured Query Language (SQL) is a database-style intended for managing data kept in a relational database management system. SQL statements are applied to execute jobs such as update data on a database or recover data from a database. The standard SQL commands such as "Select", "Insert", "Update", "Delete", "Create", and "Drop" can be used to perform virtually everything that one requires to do with a database. According to ANSI (American National Standards Institute), it is the approved language for relational database management systems.
