Answer / raj&

materialized views are schema objects that can be used to summarize,precompute,replicate and distribute data.

Answer / nitin

Materialized views are used to precompute a heavy joins instead of executing a joins again n again. Moreover it physically stores the data unlike views where it is conceptually. Materialized views can be refresh on timely manner.

How do I create a sql script?

0 Answers  

---

What is difference between select statement and cursor

3 Answers   JDA,

---

what is the difference between mysql_fetch_array and mysql_fetch_object? : Sql dba

0 Answers  

---

Can i use Commit inside the Trigger? Suppose i use commit what will be happy (it's complied /executed/work)

6 Answers  

---

write a qurey for finding the length of the sting.

6 Answers   Infosys, TCS,

---

---

Which language is used in sql?

0 Answers  

---

Explain ttitle and btitle.

0 Answers  

---

Where is pl sql used?

0 Answers  

---

I have a CURSOR then why we need BULK COLLECT again?

1 Answers  

---

Is progress software supports to ( pl/sql )?

0 Answers  

---

Is foreign key mandatory?

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  

---