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Learn PL/SQL from best Institutes in Howrah. PL/SQL is a combination of SQL and programming languages. It was developed by Oracle Corporation in the early 90s to enhance the capabilities of SQL.PL/SQL is embedded in the Oracle Database with SQL and Java.
PL/SQL program units are compiled by the Oracle Database server and stored inside the database.It is a procedural language used to combine SQL statements within its syntax.Both PL/SQL and SQL run within the same server process, bringing optimal efficiency at run time.PL/SQL contains features such as robustness, security, and portability.
The basic structure of PL/SQL is a block structure.It contains of Anonymous Blocks or Nested Blocks.PL/SQL block contains 3 sections comprising of an optional Declaration Section, a mandatory Execution Section, and an optional Exception handling Section.
A PL/SQL program unit associated with a particular database table is called a database trigger. It is used for modifying Audit data, logging events transparently, enforcing complex business rules, maintaining replica tables, implementing security authorizations etc.
PL/SQL is portable to all environments that support Oracle.It is is integrated with the Oracle data dictionary. It is a block-structured language.
The PL/SQL Complication process includes checking the syntax, binding and generation of p-code process. The Syntax Check is used for spotting the compilation errors. When all errors are corrected, a storage address is assigned to the variables that hold data. This is called Binding. P-code is a list of instructions for the PL/SQL engine. P-code is stored in the database for named blocks and is used the next time it is executed.
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