Interested to Buy Any Domain ? << Click Here >> for more details...
How to create a table using constraints...
IF i change the PARENT KEY value ,then CHILD KEY
table will also to change in the another table...
plz reply ur answers @ mak2786@gmail.com
Arunkumar
- 3 Answers
- 7731 Views
- I also Faced
- E-Mail Answers
Answer Posted / alien
1>
2> CREATE TABLE employee (emp_no INTEGER NOT NULL
CONSTRAINT prim_empl PRIMARY KEY,
3> emp_fname CHAR(20) NOT NULL,
4> emp_lname CHAR(20) NOT NULL,
5> dept_no CHAR(4) NULL)
6>
7> CREATE TABLE project (project_no CHAR(4) NOT NULL
CONSTRAINT prim_pro PRIMARY KEY,
8> project_name CHAR(15) NOT NULL,
9> budget FLOAT NULL)
10>
11> CREATE TABLE works_on1
12> (emp_no INTEGER NOT NULL,
13> project_no CHAR(4) NOT NULL,
14> job CHAR (15) NULL,
15> enter_date DATETIME NULL,
16> CONSTRAINT prim_works1 PRIMARY KEY(emp_no,
project_no),
17> CONSTRAINT foreign1_works1 FOREIGN KEY
(emp_no) REFERENCES employee(emp_no) ON DELETE CASCADE)
| Is This Answer Correct ? | 0 Yes | 3 No |
Post New Answer View All Answers
what is myisam? : Sql dba
what is a table called, if it has neither cluster nor non-cluster index? What is it used for? : Sql dba
when is the use of update_statistics command? : Sql dba
what is the difference between char_length and length? : Sql dba
How many sql statements are used?
Mention what problem one might face while writing log information to a data-base table in pl/sql?
what is blob? : Sql dba
Can procedure in package be overloaded?
Explain dml and ddl?
What is asqueryable?
Advantages and disadvantages of stored procedure?
How global cursor can be declare with dynamic trigger ?
How long will it take to learn pl sql?
Which are the different case manipulation functions in sql?
Why is normalization important?
