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Parameter and Keyword Description:
record_type_name:
This identifies the user-defined type specifier that is used in the subsequent declarations of the records.
NOT NULL:
This constraint prevents the assigning of the nulls to the field. At the run time, trying to assign the null to a field, defined as NOT NULL raises the predefined exception VALUE_ ERROR. The constraint NOT NULL should be followed by an initialization clause.
datatype:
The datatype is a type specifier.
:= | DEFAULT:
This keyword or operator allows you to initialize the fields to the default values.
expression:
This is a indiscriminately complex combination of the constants, variables, literals, operators, & function calls. The easiest expression consists of a single variable. When the declaration is explained, the value of the expression is assigned to the field. The value and the field should have the compatible datatypes.
Definition of CROSS JOIN - SQL Let s = t1 CROSS JOIN t2, where t1 and t2 are table expressions optionally accompanied by range variables. Then: Note: Here T denotes Table
Explicit Cursor Attributes The cursor variable or each cursor has four attributes: %FOUND, %ISOPEN, %ROWCOUNT, and %NOTFOUND. When appended to the cursor or cursor variable, th
Assignments in pl/sql The Variables and constants are initialized every time a block or subprogram is entered. By default, the variables are initialized to NULL. Therefore, unle
Special cases of projection This section describes the identity projection, r {ALL BUT}, and the projection on no attributes, r { }, which yields TABLE_DUM when r is empty, ot
Referencing Records Unlike the elements in a collection, that are accessed using subscripts, the fields in a record are accessed by name. To reference an individual field, you
Lightweight system to provide and take info from workers in the field and office, have basic design outlined already just require build and implementation Desired Skills CSS,
Need Windows and Linux system Administrator We are seeking a part time system administrator to take care of our servers. Your things to do would add, but not limited to: -
Using Savepoints The scope of the savepoint is a transaction in which it is defined. The Savepoints defined in the major transaction are not related to the savepoints defined
Short-Circuit Evaluation When computing a logical expression, the PL/SQL uses short-circuit evaluation. That is, the PL/SQL stops computing the expression as soon as the result
Cursor Attributes The Cursors and cursor variables have 4 attributes which give you helpful information about the execution of a data manipulation statement. Syntax:
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