What is a PL SQL collection?

What is PL SQL?

PL/SQL is basically a procedural language, which provides the functionality of decision making, iteration and many more features of procedural programming languages. … One can create a PL/SQL unit such as procedures, functions, packages, triggers, and types, which are stored in the database for reuse by applications.

Is PL SQL record a collection type?

PL/SQL Records

A record is a collection of data objects that are kept in fields, each having its own name and datatype. A record can be thought of as a variable that can store a table row or a set of columns from a table row.

What is PL SQL record?

A PL/SQL record is a composite data structure which consists of multiple fields; each has its own value. The following picture shows an example record that includes first name, last name, email, and phone number: PL/SQL record helps you simplify your code by shifting from field-level to record-level operations.

Is PL SQL good for Career?

PL SQL is an integrated and high-performance database language that can work well with other languages like C++, Java, and C#. However, if you want to write a code that is going to interact with Oracle database, there is no better language than PL SQL for this job.

IT IS INTERESTING:  Does Shopify use JavaScript?

How do you handle exceptions in PL SQL?

PL/SQL allows you to define your own exceptions according to the need of your program. A user-defined exception must be declared and then raised explicitly, using either a RAISE statement or the procedure DBMS_STANDARD. RAISE_APPLICATION_ERROR.

What is Varray in PL SQL example?

The PL/SQL programming language provides a data structure called the VARRAY, which can store a fixed-size sequential collection of elements of the same type. A varray is used to store an ordered collection of data, however it is often better to think of an array as a collection of variables of the same type.

How do you initialize a collection in PL SQL?

To create collections, you define a collection type, then declare variables of that type. You can define TABLE and VARRAY types in the declarative part of any PL/SQL block, subprogram, or package. Collections follow the same scoping and instantiation rules as other types and variables.

What are the types of collection in PL SQL?

PL/SQL – Collections

  • Index-by tables or Associative array.
  • Nested table.
  • Variable-size array or Varray.

What is bulk collection in Oracle PL SQL?

A bulk collect is a method of fetching data where the PL/SQL engine tells the SQL engine to collect many rows at once and place them in a collection. The SQL engine retrieves all the rows and loads them into the collection and switches back to the PL/SQL engine. … The data can now be processed as needed in memory.

What is the difference between record and collection in Oracle?

In a collection, the internal components always have the same data type, and are called elements. … To create a collection variable, you either define a collection type and then create a variable of that type or use %TYPE . In a record, the internal components can have different data types, and are called fields.

IT IS INTERESTING:  Does iOS use JavaScript?
Categories PHP