The statement in SQL which allows to change the definition of a table is

Related MCQs

• The statement in SQL which allows to change the definition of a table is
• Consider a hash table of size seven, with starting index zero, and a hash function (3x + 4)mod7. Assuming the hash table is initially empty, which of the following is the contents of the table when the sequence 1, 3, 8, 10 is inserted into the table using closed hashing? Note that ‘_’ denotes an empty location in the table.
• View the Exhibit and examine the data in the EMPLOYEES tables. Evaluate the following SQL statement: SELECT employee_id, department_id FROM employees WHERE department_id= 50 ORDER BY department_id UNION SELECT employee_id, department_id FROM employees WHERE department_id= 90 UNION SELECT employee_id, department_id FROM employees WHERE department_id= 10; What would be the outcome of the above SQL statement?
• What SQL command will allow you to change the table STUDENT to add the constraint named GradeCheck that states that the values of the Grade column must be greater than 0?
•                  dump, writes out SQL DDL statements and SQL insert statements to a file, which can then be reexecuted to re- create the database.
• Which SQL function is used to count the number of rows in a SQL query?
• Which datatype is not allowed in the definition of PL/SQL record?
• Which SQL Query is use to remove a table and all its data from the database?
• Which SQL Query is use to remove a table and all its data from the database?
• In SQL, which command is used to issue multiple CREATE TABLE, CREATE VIEW and GRANT statements in a single transaction?