When you execute a SQL Query, it will be executed in the following sequence. FROM ON JOIN WHERE GROUP BY HAVING SELECT DISTINCT ORDER BY TOP When a query is submitted to the database, it is executed in the following order: FROM clause WHERE clause...
What is bulk collect? This keyword ask the SQL engine to return all the rows in one or several collections before returning to the PL/SQL engine so, there is one single roundtrip for all the rows between SQL and PL/SQL engine. BULK COLLECT cannot be use...
-->Not Compiled -->No SELECT Trigger Support -->Complete Trigger Failure -->Disabled Triggers -->No Version Control -->Update OF COLUMN -->No Support of SYS Table Triggers -->Mutating Triggers -->Hidden Behavior
What are different execution methods of executables? FlexRpt The execution file is wrnitten using the FlexReport API. FlexSql The execution file is written using the FlexSql API. Host The execution file is a host script. Oracle Reports The execution file...
What are attributes of cursor? · SQL%ROWCOUNT: Number of rows affected by most recent SQL statement. · SQL%FOUND: Boolean attribute that evaluates to TRUE if most recent SQL statement affects one or more rows. · SQL%NOTFOUND: Boolean attribute that evaluates...
How to debug the procedure or function? By using DBMS_OUTPUT & DBMS_DEBUG oracle supplied package. ALTER PROCEDURE procedurename DEBUG; OR ALTER PROCEDURE procedurename PLSQL_DEBUG=TRUE OR We can use autonomous_transaction procedure to create log & put...
The general syntax is: FIRST_VALUE(
What are the advantage & disadvantage of package A package is a group of PL/SQL types, objects, and stored procedures and functions. The specification part of a package declares the public types, variables, constants, and subprograms that are visible...
DROP PACKAGE [BODY] The DROP PACKAGE statement removes a stored package from the database. Both the specification and the body are dropped. DROP PACKAGE BODY removes only the body of the package. Required privilege No privilege is required for the package...
1. How to invoke the Functions in SQL Expressions? We invoke the SQL functions when activates are too complex, too awkward, or unavailable with SQL. By invoking functions we can increase efficiency when used in the WHERE clause to filter data, as opposed...
