What are the advantages of Gathering Statistics?

Shivam Softa

• Sep 19th, 2018

Helps Oracle engine to create better execution plan to execute the query.

ushodaya

• May 20th, 2018

We should generate statistics for all tables and clusters and all types of indexes accessed by your SQL statements before using the cost-based approach. If the size and data distribution of your table...

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Shivam Softa

• Sep 19th, 2018

SELECT LISTAGG(VAL) WITHIN GROUP(ORDER BY LE) FROM
(select LEVEL LE , substr(SHIVAM,-LEVEL,1) VAL FROM DUAL CONNECT BY LEVEL

ushodaya

• May 20th, 2018

Declare
str1 varchar2(50):=&str;
str2 varchar2(50);
len number;
i number;

begin
len:=length(str1);

for i in reverse 1..len
loop
str2:=str2 || substr(str1,i,1);
end loop;

dbms_output.put_line(Reverse of String is:||str2);
end;
/

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 A FUNCTION is always returns a value using the return statement.        A  PROCEDURE   may  return one or more values through parameters or may not return at all.

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krishnaindia2007  

 Profile Answers by krishnaindia2007 Questions by krishnaindia2007

• Member Since Sep-2007 | May 3rd, 2008

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1. Function is mainly used in the case where it must return a value. Where as a procedure may or may not return a value or may return more than one value using the OUT parameter.
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2. Function can be called from SQL statements where as procedure can not be called from the sql statements

3. Functions are normally used for computations where as procedures are normally used for executing business logic.

4. You can have DML (insert,update, delete) statements in a function. But, you cannot call such a function in a SQL query.

5.?Function returns 1 value only. Procedure can return multiple values (max 1024).

6.Stored Procedure: supports deferred name resolution. Example while writing a stored procedure that uses table named tabl1 and tabl2 etc..but actually not exists in database is allowed only in during creation but runtime throws error Function wont support deferred name resolution.

7.Stored procedure returns always integer value by default zero. where as function return type could be scalar or table or table values

8. Stored procedure is precompiled execution plan where as functions are not.
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9.A procedure may modify an object where a function can only return a value The RETURN statement immediately completes the execution of a subprogram and returns control to the caller.

mahendra pal

• Sep 18th, 2018

Procedure may or may not return value

mangesh patil

• Aug 22nd, 2017

Procedure may or may not return value where as function should return one value.

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Write a PLSQL function that accepts some text and validates that the text has only Alphanumeic characters and returns true else returns false

Priya

• Oct 25th, 2018

LENGTH(TRIM(TRANSLATE(string1, abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ+-.0123456789, )))

This function will return a null value if string1 is alphanumeric. It will return a value "greater than 0" if string1 contains any non-alphanumeric characters.

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Hi Can anyone explain what this mean? I have practise PL/SQL about REF obj_type, my codes are: CREATE or REPLACE TYPE home_type AS OBJECT (street VARCHAR2(50), city VARCHAR2(20), state VARCHAR2(20), zipcode VARCHAR2(6), owner VARCHAR2(10));/CREATE TABLE homes OF home_type;INSERT INTO homes VALUES ('300 Regina St', 'WATERLOO', 'ON', '010010', 'HFWANG');INSERT INTO homes VALUES ('301 Regina St', 'WATERLOO',...

priti

• Nov 11th, 2019

Kindly let me know what do you want in result using ref cursor? here you ref cursor as a table which is not exists in system. that is what it is giving error

krishnaveni_g

 Profile Answers by krishnaveni_g Questions by krishnaveni_g

• Jul 15th, 2008

I checked the code it's working fine.

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Divisha

• Dec 30th, 2019

Can You please elaborate in what way can we do it ?

psingla

 Profile Answers by psingla Questions by psingla

• May 6th, 2010

In 10g we can

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RAVI KUMAR BURRI

• Jan 19th, 2020

SET AUTOTRACE ON EXPLAIN

machomanic

 Profile Answers by machomanic Questions by machomanic

• Jul 8th, 2010

You can use the command SQL> SET TIMING ON;This will show how much time your query took for the execution.

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 Cursor is a named private SQL area from where information can be accessed. Cursors  are  required  to  process rows individually for queries returning multiple rows.

Rounak037

• Jan 22nd, 2020

Cursor is used when the user needed to update record in a single or in row buy row manner in a database table, Cursor is required to process rows individually for queries returning multiple rows.
Basically cursor are two types:
1. Implicit Cursor.
2. Explicit Cursor.

rahulg5211

 Profile Answers by rahulg5211 Questions by rahulg5211

• Oct 4th, 2009

Cursor is an small memory allocation or workstation where operation or processing is done on the data.Types of attribute of cursor are-:1)ROWCOUNT2)ISOPEN3)FOUND4)NOTFOUND

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Write a PL/SQL anonymous block with exception handling to print your name 10 times?

Sri

• Feb 7th, 2020

Begin
i varchar2(10) :=xxxxxxx
begin
for x in 1..10 loop
dbms_output.put_line(i);
end loop;
end;
/

Bibhudatta Panda

• Jun 18th, 2019

Code
 

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