What types of joins are used in writing subqueries?
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How to export several tables together?
i can create a view with two columns from emp table,, later i need to add one more emp column to existing view.. what is query similarly add one more column to existing primary key constraint.. please give me the solutions
How to check database size in Oracle?
Explain table?
what is the difference between data migration and production migration.
What is cursor
18. Display the clientno and total value for all orders placed by that client. Output the result in the following format: Client <clientno> has placed orders to the value of <total value>
wirte the syntax of update query?
SQL> CREATE TABLE to_table 2 (col1 NUMBER); Table created. SQL> CREATE OR REPLACE TRIGGER statement_trigger 2 AFTER INSERT ON to_table 3 BEGIN 4 DBMS_OUTPUT.PUT_LINE('After Insert Statement Level'); 5 END; 6 / Trigger created. SQL> CREATE OR REPLACE TRIGGER row_trigger 2 AFTER INSERT ON to_table 3 FOR EACH ROW 4 BEGIN 5 DBMS_OUTPUT.PUT_LINE('After Insert Row Level'); 6 END; 7 / Trigger created. SQL> INSERT INTO TO_TABLE VALUES(1); After Insert Row Level After Insert Statement Level 1 row created. SQL> BEGIN 2 INSERT INTO TO_TABLE VALUES(2); 3 INSERT INTO TO_TABLE VALUES(3); 4 INSERT INTO TO_TABLE VALUES(4); 5 INSERT INTO TO_TABLE VALUES(5); 6 INSERT INTO TO_TABLE VALUES(6); 7 INSERT INTO TO_TABLE VALUES(7); 8 INSERT INTO TO_TABLE VALUES(8); 9 INSERT INTO TO_TABLE VALUES(9); 10 INSERT INTO TO_TABLE VALUES(0); 11 END; 12 / WAT LL BE THE O/P??? XPLAIN IT>>>>
"primary key=unique+null" is equal,reson?not,reason?
How do you find current date and time in oracle?
Explain the use of file option in exp command.