Does sap use sql?

0 Answers  

---

What is mutating sql table?

0 Answers  

---

Tell me what a package consists of.

3 Answers  

---

how to get second highest salary in SQL(as/4000

29 Answers   iGate,

---

How do you optimize a stored procedure in sql?

0 Answers  

---

what is 'mysqlcheck'? : Sql dba

0 Answers  

---

How did you export data from database to excel file.

1 Answers   TCS,

---

What is self-join and what is the requirement of self-join?

0 Answers  

---

how to get @@error and @@rowcount at the same time? : Sql dba

0 Answers  

---

Why do we need cursor in pl sql?

0 Answers  

---

What are the different types of functions in sql?

0 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  

---