why can't we assign not null constraint as table level constraint

3 Answers   CTS, Wipro,

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What are the uses of Rollback Segment ?

2 Answers  

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How to delete an existing row from a table in oracle?

0 Answers  

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Why do I get java.lang.abstractmethoderror when trying to load a blob in the db?

0 Answers  

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Explain oracle insert into command?

0 Answers  

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What do the 9i dbms_standard.sql_txt() and dbms_standard.sql_text() procedures do?

0 Answers  

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How to loop through data rows in the implicit cursor?

0 Answers  

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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>>>>

1 Answers   Infosys,

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what is the use of triggers in Java program? I mean where do we use triggers in Java programming?

0 Answers  

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What are the built-in functions used for sending Parameters to forms ?

0 Answers   Oracle, TCS,

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What are the common oracle dba tasks?

0 Answers  

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How to write date and time literals in oracle?

0 Answers  

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