Dear readers, these PL/SQL Interview Questions have been designed specially to get Routines written in PL/SQL can be called in Oracle call interface, Java. Oracle Pl SQL Interview Questions and - Free download as Word Doc .doc /.docx), PDF File .pdf), Text File .txt) or read online for free. Welcome to Mindmajix - The leading global online training platform. If you're looking for Oracle PL SQL Interview Questions for Experienced or Freshers, you are.

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    Sql Plsql Interview Questions Pdf

    prefer PL/SQL than SQL. Here are a few PL/SQL questions that can help to crack an interview. Download PL/SQL Interview Questions PDF. + Pl/sql Interview Questions and Answers, Question1: What is PL/SQL? Question2: Is there a PL/SQL Engine in SQL*Plus? Question3: Is there a limit on the. Pl Sql Interview Questions Answers - [Free] Pl Sql Interview Questions Answers [ PDF] [EPUB]. Frequently asked SQL Interview Questions with.

    Triggers are mainly required for the following purposes To maintain complex integrity constraints Auditing table information by recording the changes Signaling other program actions when changes are made to table Enforcing complex business rules Preventing invalid transactions Question 9 Explain the difference in execution of triggers and stored procedures? Answer: A stored procedure is executed explicitly by issuing procedure call statement from another block via a procedure call with arguments. The trigger is executed implicitly whenever any triggering event like the occurrence of DML statements happens. Question 10 Explain the difference between Triggers and Constraints? Answer: Triggers are different from constraints in the following ways Triggers Only affect those rows added after the trigger is enabled. Affect all rows of the table including that already exist when the constraint is enabled.

    Oracle PL SQL Interview Questions

    For named blocks, p-code is stored in the database, and it is used the next time the program is executed. How does a syntax error differ from a runtime error?

    A misspelled keyword is an example of a syntax error. Try to find it. All work done by the transaction becomes permanent.

    You might also like: MYSQL STORED PROCEDURE PDF

    Other users can see changes in data made by the transaction. Any locks acquired by the transaction are released. Explain Implicit and Explicit cursors Oracle automatically declares an implicit cursor every time a SQL statement is executed.

    The user is unaware of this and cannot control or process the information in an implicit cursor. The program defines an explicit cursor for any query that returns more than one row of data.

    This declaration allows the application to sequentially process each row of data as the cursor returns it. How an Implicit cursor works?

    An INSERT statement needs a place to receive the data that is to be inserted into the database; the implicit cursor fulfills this need. The most recently opened cursor is called the SQL cursor.

    How an Explicit cursor works?

    Explicit cursors — Explicit cursors are used for queries that return more than one row. It is a programmer-defined cursor for gaining more control over context area. In order to use explicit cursors, the following steps are used-. Implicit cursors- These cursors are created when any SQL statements are executed.

    PL SQL Interview Questions | Important PL SQL Interview Questions

    It is an attribute which is used for anchoring. The fields of the row have same name and data types as column in the view. This declares a record that can store an entire row for DEPT table.

    By having the basic knowledge, you can face the interviewer with a greater confidence. Mar 27, , Posted in Interview Questions, 20 Questions.

    There is a considerable difference between function, procedure and package. Differentiate between syntax and runtime errors? You need to add an exception handling section to handle those errors. The few possible combinations are: Explain the difference between Triggers and Constraints?

    There are several differences between Triggers and constraints. Given below are the major ones: Trigger Constraints Trigger affects only those rows, which are added after it is enabled.

    Constraints affects all the rows i. Triggers unlike constraints is capable of implementing high-end business rules that are complicated A constraint is responsible only for maintaining the integrity of the database.

    It offers extensive error checking. Users can write their own customized error handling routines. It also allows free access and sharing of same subprograms by multiple applications. Explain cursor types? In order to use explicit cursors, the following steps are used- Declare the cursor, Syntax: Open the cursor Syntax: Fetch rows from the cursor Syntax: What is a mutating table and a constraining table?

    A mutating table is the one, which is modified using a DML statement or a table with defined triggers. A constraining table is the one, which is being read for a referential integrity constraint. A cursor is a pointer to the area of the memory containing SQL statements and information for processing the statements.

    20+ PL/SQL Interview Questions in - Online Interview Questions

    What is the difference between execution of triggers and stored procedures? Stored procedure takes place explicitly when call statements are issued from another block. The trigger is implicitly executed whenever any activating events like the occurrence of DML statements happen.

    Why triggers are used?

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