A scrollable cursor, however, can move forward and backward, and can seek any desired record in the cursor. Such operations are common in applications that present results sets in scrolling windows. With a scrollable cursor, application developers do not need to create and manage their own buffer for the records.
SIGN (a): Returns 1 if a is positive or if a is 0, and -1 if a is less than 0.
This is called dynamic SQL. An example would be:
set lines 90 pages 0 termout off feedback off verify off
spool drop_all.sql
select ?drop user ?||username||? cascade;? from dba_users
where username not in ("SYS?,?SYSTEM?);
spool off
Essentially you are looking to see that they know to include a command (in this case DROP USER...CASCADE;) and that you need to concatenate using the ?||? the values selected from the database.
Insert/Update/Delete :- 3
Before/After:- 2
Row Level/Statement Level:-2
Hence 3*2*2
For sorting we use order by clause in select statement. This is used to sort data in ascending order or descending order.
To group data based on perticulr column we use groupby clause.
Both are used to get distinct values.
Webmaster 23rd of May 2012
Tell us what you feel about SQL Plus Interview Questions and Answers
All comments will be published after review. No login or registration is required to post a comment on SQL Plus Interview Questions and Answers We offer and invite you to submit your valuable comment now; Please be respectful of others when commenting. Insulting others, self-promotional comments, website promotional comments, marketing stuff, SEO Techniques, SMS-style content and off-topic comments will not be approved at this information portal.
So start sharing your thoughts regarding SQL Plus Interview Questions and Answers
Thank you.