about optimization of SQL queries and PL/SQL scripts, however, you .. Note: You can automatically generate documentation (HTML, PDF, CHM,. For Oracle Database 11g there is a good book on expert indexing, if you. Development, Oracle Database 10g PL/SQL Programming, and Expert. Oracle PL/SQL. About the Technical Editor. A. Scott Mikolaitis is an Applications Architect. Oracle Database PL/SQL Language Reference, 11g Release 1 () Oracle Corporation and its affiliates disclaim any liability for any.
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Any SQL statement issued inside a PL/SQL block also has an SQL_ID. Any Oracle performance specialist would be remiss not to advise you of the potential . Listings 7 - 21 Expert Oracle Practices Oracle Database Administration from the Oak Web Application Programming for PL/SQL Developers, Oracle DBA. PL/SQL Program Units Exam Guide from Oracle Press. Mr. O'Hearn is an officially viii OCA Oracle Database SQL Certified Expert Exam Guide (Exam 1Z) The size of the PDF version is 22MB. Its syntax charts.
It is the reason, we are employing each row clause and internally stored DML transaction in trigger specification, these qualifiers :old, :new, are also called as records type variables. What is Mutating Trigger? Ans: Into a row level trigger based on a table trigger body cannot read data from same table and also we cannot perform DML operation on same table. If we are trying this oracle server returns mutating error oracle table is mutating. This error is called mutating error, and this trigger is called mutating trigger, and table is called mutating table. Mutating errors are not occurred in statement level trigger because through these statement level trigger when we are performing DML operations automatically data committed into the database, whereas in row level trigger when we are performing transaction data is not committed and also again we are reading this data from the same table then only mutating errors is occurred.
In static cursor database servers executes only one select statement at a time for a single active set area where in ref cursor database servers executes number of select statement dynamically for a single active set area that's why those cursor are also called as dynamically cursor.
Generally static cursor does not return multiple record into client application where as ref cursor are allowed to return multiple records into client application Java,.
This is an user defined type so we are creating it in 2 steps process i. What are The Types of Ref Cursors? Ans: In all databases having 2 ref cursors. Strong ref cursor Weak ref cursor Strong ref cursor is a ref cursor which have return type, whereas weak ref cursor has no return type. What is Difference Between trim, delete collection method?
What is Overloading Procedures? Overloading procedure having same name with different type or different number of parameters. What is Global Variables?
What is Forward Declaration? What is Flashback Query?
Ans: Flashback query are handle by Database Administrator only flashback queries along allows content of the table to be retrieved with reference to specific point of time by using as of clause that is flashback queries retrieves clause that is flashback queries retrieves accidental data after committing the transaction also.
Flashback queries generally uses undo file that is flashback queries retrieve old data before committing the transaction oracle provide two method for flashback queries Method1: using timestamp.
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