You can display the structure of a table using SQL*PLUS command DESCRIBE. It displays then name, datatype and whether the column can store null value for each column of the table.
The following is the syntax of DESCRIBE command.
DESC[RIBE] objectname
Displays the column definitions for the specified object. The object may be a table, view, synonym, function or procedure.
To display the structure of COURSES table, enter:
SQL> DESC COURSES
Name Null? Type
---------------------------------------------- -------- ----------
CCODE NOT NULL VARCHAR2(5)
NAME VARCHAR2(30)
DURATION NUMBER(3)
FEE NUMBER(5)
PREREQUISITE VARCHAR2(100)
DESCRIBE is an SQL*Plus command and can be abbreviated to DESC.
Subscribe to:
Post Comments (Atom)
SQL Interview Questions and Answers
There is given sql interview questions and answers that has been asked in many companies. For PL/SQL interview questions, visit our next...
-
1) PL/SQL PROGRAM TO CUALCULATE THE NET SALARY IF DA IS 30% OF BASIC,HRA IS 10% OF BASIC AND PF IS 7% IF BASIC SALARY IS LESS THAN 8000 ,PF...
-
1.Write a program to print the following format WELCOME TO PL/SQL PROGRAMMING BEGIN DBMS_OUTPUT.PUT_LINE('WELCOME TO PL/SQL PROGRAMMING...
-
A DBMS that is based on relational model is called as RDBMS. Relation model is most successful mode of all three models. Designed by E.F. C...
No comments:
Post a Comment