How can you view the errors encountered in a trigger?

0 Answers  

---

Which software is used for pl sql programming?

0 Answers  

---

How do I order by ascending in sql?

0 Answers  

---

what is an execution plan? When would you use it? How would you view the execution plan? : Sql dba

0 Answers  

---

What are the different types of a subquery?

0 Answers  

---

i have a table emp and columns ename,empno,mgr_id,i need ename,manager name as result i.e employee respective manager.. example empno ename mgr_id 1 john 3 2 paul 3 3 smith 1 4 kevin 1 5 stewart 2 result has to look like this ename manager john smith paul smith smith john kevin john stewart paul can u plz help me out in this.....

8 Answers  

---

Explain correlated query work?

0 Answers  

---

Does truncate free space?

0 Answers  

---

what are the security recommendations while using mysql? : Sql dba

0 Answers  

---

How do you use a while loop in pl sql?

0 Answers  

---

What is a cursor for loop ?

4 Answers  

---

Hi All, I am new to both this blog and technology. I was able to see a response for one of the questions on triggers as below. I would like to know why are we using " if rtrim(to_char(sysdate,'day'))=rtrim('sunday') then" instead, can't we use " if sysdate = 'sunday' then". I can understand the use of "rtrim", but dont know y v r using to_char. I have seen this in many cases but did not get a convincible explaination. Please help me with this and do excuse if this question sounds silly. Thanks in advance...... create or replace trigger trg_sun before insert on <table name> begin if rtrim(to_char(sysdate,'day'))=rtrim('sunday') then raise_application_error(-20345,'no transaction in sunday'); end if; end trg_sun;

2 Answers  

---