What are the data type in PL SQL?

What are the data type in PL SQL?

Data types (PL/SQL)

PL/SQL data type DB2® SQL data type Description
INT INT Signed four-byte integer numeric data
INTEGER INTEGER Signed four-byte integer numeric data
LONG CLOB (32760) Character large object data
LONG RAW BLOB (32760) Binary large object data

What is declare in PL SQL?

When you declare a variable, PL/SQL allocates memory for the variable’s value and the storage location is identified by the variable name. The syntax for declaring a variable is − variable_name [CONSTANT] datatype [NOT NULL] [:= | DEFAULT initial_value]

What is declaration section in PL SQL?

7.3. Declaration Section. The declaration section is required if any variables are to be used in a PL/SQL block. The declaration section also defines cursors, types, local procedures, and functions that are used in a block. If no variables or other elements need to be declared, then this section may be omitted.

How do you declare a date datatype in PL SQL?

Use the following code to declare the DATE datatype: SQL> declare 2 variable1_dt DATE; 3 begin 4 NULL; 5 end; 6 / PL/SQL procedure successfully completed. Be careful when comparing dates. If you really don’t care about the time of day, you can use the TRUNC() function.

What are the data types in Oracle?

Oracle Built-In Datatypes

  • CHAR.
  • NCHAR.
  • VARCHAR2 and VARCHAR.
  • NVARCHAR2.
  • CLOB.
  • NCLOB.
  • LONG.

How should any declaration statement end in PL SQL?

Each declaration must be terminated by a semicolon. A mandatory keyword that introduces the executable section, which can include one or more SQL or PL/SQL statements.

How do you declare a date variable in SQL?

To declare a date variable, use the DECLARE keyword, then type the @variable_name and variable type: date, datetime, datetime2, time, smalldatetime, datetimeoffset. In the declarative part, you can set a default value for a variable. The most commonly used default value for a date variable is the function Getdate().

What is PL/SQL datatype?

What is PL/SQL Datatypes? Data Types in PL/SQL are used to define how the data will be stored, handled, and treated by Oracle during the data storage and processing. Data types are associated with the specific storage format and range constraints. In Oracle, each value or constant is assigned with a data type.

How do you declare an object type in PL SQL?

After an object type is defined and installed in the schema, you can use it in any PL/SQL block, subprogram, or package. In PL/SQL, you then declare a variable whose data type is the user-defined type or ADT that you just defined. Objects or ADTs follow the usual scope and instantiation rules. You can define object types using CREATE TYPE .

How do you declare variables and data structures in PL/SQL?

You commonly do this by declaring variables and data structures in your programs, and then working with that PL/SQL-specific data. A variable is a named instantiation of a data structure declared in a PL/SQL block (either locally or in a package). Unless you declare a variable as a CONSTANT, its value can be changed at any time in your program.

What is a variable_name in PL/SQL?

When you declare a variable, PL/SQL allocates memory for the variable’s value and the storage location is identified by the variable name. Where, variable_name is a valid identifier in PL/SQL, datatype must be a valid PL/SQL data type or any user defined data type which we already have discussed in the last chapter.

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