Skills required for Oracle test 1Z0-147.

Oracle has specified around ninety objectives for 1Z0-147 (Oracle9i: Program with PL/SQL) test, which are grouped under eleven topics. Following are the important areas in which an individual should possess good knowledge before taking the test: Writing PL/SQL programs. Designing......
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Things to practice for Oracle test 1Z0-147.

The 1Z0-147 (Oracle9i: Program with PL/SQL) test focuses on a candidate's ability to develop applications by using the PL/SQL. It requires the candidate to have a good command over PL/SQL. One should be capable of understanding the requirements of an application and program accordingly. Before......
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Developing an Oracle Application.

When writing a program to interact with the Oracle database, an application developer has the following choices: Client/Server Model: In a traditional client/server program, the code of an application runs on a computer other than the Oracle database server. Database calls are......
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What is a trigger?

Trigger A trigger is a kind of procedure that executes implicitly when a table or view is modified or some user actions or database system actions occur. Similar to a stored procedure, a trigger stored in the database can include SQL and PL/SQL or Java statements to run as a unit and can......
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What is PL/SQL?

PL/SQL is Oracle's procedural extension to SQL, which is the standard database access language. PL/SQL is an advanced fourth-generation programming language (4GL) and offers seamless SQL access, tight integration with the Oracle server and tools, portability, security, and modern software......
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What is the structure of a PL/SQL block?

Procedural Language/Structured Query Language (PL/SQL) is a procedural language extension to SQL, the standard data access language for relational databases. PL/SQL is not an Oracle product in its own right; rather, it is a technology used by Oracle server and certain Oracle tools. PL/SQL......
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How does Oracle server manage dependencies among objects?

Oracle server automatically records dependencies among objects. To manage dependencies, all schema objects have a status (VALID or INVALID) that is recorded in the data dictionary. The status of a schema object can be viewed by querying the USER_OBJECTS data dictionary view. If an object has a......
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How is a new job submitted to the job queue?

The DBMS_JOB.SUBMIT procedure (the SUBMIT procedure is provided with the DBMS_JOB Oracle supplied package) is used to submit a new job to be executed to the job queue. The DBMS_JOB.SUBMIT procedure accepts five parameters and returns the number of a submitted job through the JOB parameter. The......
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How is a SQL statement executed?

All SQL statements have to go through the following stages: Parse: Every SQL statement must be parsed. Parsing the statement includes checking the statement's syntax and validating the statement, ensuring that all references to objects are correct, and ensuring that relevant privileges to......
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How is a trigger compiled?

A trigger is similar to a PL/SQL anonymous block, but with the additional :NEW and :OLD capabilities. However, their compilation is different. A PL/SQL anonymous block is compiled each time it is loaded into the memory. The compilation involves the following three stages: Syntax checking:......
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