What are the ddl commands?

0 Answers  

---

How to select unique records from a table?

0 Answers  

---

please explain database architecture..

1 Answers   Infosys,

---

How to connect a sql*plus session to an oracle server?

0 Answers  

---

What is 19 null 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  

---

How do you rename a table in sql?

0 Answers  

---

I want to create synonym for table emp but in my pc it is giving insufficient previliges.I am using user scott.Please suggest me.

3 Answers  

---

How to pipe multiline string to isql?

0 Answers  

---

How to call a javascript function from pl sql?

0 Answers  

---

What is INSTEAD OF trigger ?

13 Answers   Hexaware, TCS,

---

how to select first 5 records from a table? : Sql dba

0 Answers  

---