To add one more point to the disadvantages of packages: We cannot declare ref cursor in a package. And Difference between both?? A parameterized cursor are static cursor that can accept passed in parameter values when they are opened. Parameterized can only reference to its own parameter parameterized cursor cannot reference to local variable.
How and When to Write SQL in PLSQL
Cursor is a private SQL area which is used to retrieve multiple rows from one or more tables. The cursor which uses parameter is called parameterised cursor. Based on the given parameter value the cursor will execute. Member Since Sep May 13th, Used to refer an object which does not have any pysical reference in database table.
If it contains only one column with varchar2 data type then how can it return a date through sysdate. The data in a global temporary table is private, such that data inserted by a session can only be accessed by that session.
The this web page rows in a global temporary table can be preserved for t Member Since Sep May 3rd, 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. 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. You can have DML insert,update, delete statements in a function.
But, you cannot call such a function in a SQL query. Function returns 1 value only. Procedure can return multiple values max Example while writing a stored procedure that uses table named tabl1 and tabl2 etc. Stored procedure returns always integer value by default zero. Stored procedure is precompiled execution plan where as functions are not. 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.
Bulk binding is very useful in performance tunning scenarios. Every time there click a context switch, the cost is more.
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To handle this we have a functionality called bulk binding w How do you find the impact for the change and how to find the tables which are connected to this procedure or package?
Unlike tables ref cursors do not read article data. They act like mold to hold data during the execution of the piece of code so proper coding and use of bind variables can help decrease the burden of proces If have 5 procedures in my specification part and used 4 in my body part while compiling will it throw error or not?
Yes it will throw error. Yes, If procedure declared in specification not defined in body will through compilation error saying: Basically the are 5 type of trigger on basis of triggering events 1.
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System or schema level 4. If you are trying to access or modify the triggering table into the same trigger and that too for a row level trigger then Mutating Trigger error occurred.
A unique key constraint can be applied to single How To Write Pl Sql or combination of fields which uniquely identifies a record. Please select the most appropriate category and mention a brief question title along with clear question details. Login to Ask Question or Register your free account. I have read, and agree to abide by the GeekInterview Talk Forums rules.
Please Here OFF your ad blocker. First Prev Next Last Page. Mar 21 What are the disadvantages of Packages and triggers??
Nov 21 What is Simple Cursor? Akash Mohan singh Dec 26th, A parameterized cursor are static cursor that can accept passed in parameter values when they are opened. Dec 26 Jul 25 Why DUAL table is not visible?
Aditya Kumar Dec 16th, If it contains only one column with varchar2 data type then how can it return a date through sysdate.
Nov 04 FOR i IN Nov 27 What are the advantages of Gathering Statistics?
Apr 21 What is Global temporary table? Mar 18 How can we hide a package from other users? Anshul soni Sep 27th, Answer 1: Arundhati Apr 20th, To Hide a object, dont give any grants. Nov 28 Sep 02 Pavan Jul 27th, Function works at variable level where as procedures works at dataset level. Dec 07 Nand Kumar Sahu Jul 13th, Bulk binding is very useful in performance tunning scenarios.
May 25 Shridevi Bhat Jun 30th, Yes it will throw error. Aug 11 Yogesh Jun 2nd, Basically the are 5 type of trigger on basis of triggering events 1. Dec 01 If a trigger body is trying to update dependent tables, will it get a mutating error? How do you resolve it? Amit Bhardwaj Feb 9th, If you are trying to access or modify the triggering table into the same trigger and that too for a row level trigger then Mutating Trigger error occurred. Sep 09 A set of related declarations and procedural statements How To Write Pl Sql called block.
Optional any errors to be trapped End: Kevin Korir Dec 10th, Declare: Aug 19 Which is faster, Drop or Truncate? Explain masthan May 30th, Truncate is faster compared to Drop. Rajan Mar 17th, 1. May 09 How to reverse string without using string function? Tarika Bhutani May 25th, Code.
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