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What Is a Record ?
A record is a group of related data items that stored in the fields, each with its own name and datatype. Assume that you have different data about an employee like name, hire date, and salary. These items are logically associated but dissimilar in type. The record containing a field for each item lets you treat the data as a logical unit. Consequently, records make it easier to organize and represent the information.
The attribute %ROWTYPE declare a record that presents a row in the database table. Though, you cannot specify the datatypes of the fields in the record or declare the fields of your own. The datatype RECORD lifts these restrictions and define your own records.
what is the use of declare keyword
Explicit Cursors The set of rows returned by the query can include zero, one, or multiple rows, depending on how many rows meet your search criteria. Whenever a query returns
%ROWTYPE: This attribute gives a record type which represents a row in the database table or a row fetched from a formerly declared cursor. The Fields in the record and corresp
Multiset types - SQL An SQL multiset is what in mathematics is also known as a bag-something like a set except that the same element can appear more than once. The body of an
Case Sensitivity Similar to all the identifiers, the variables, the names of constants, and parameters are not case sensitive. For illustration, PL/SQL considers the following n
Use Serially Reusable Packages To help you to manage the use of memory, the PL/SQL gives the pragma SERIALLY_ REUSABLE that mark some packages as serially reusable . So mark
a. Write an anonymous block that contains a PL/SQL function. Given an order number orderNo, the function will calculate the total number of the parts in the order. Then the anonym
Fetching from a Cursor Variable The FETCH statement retrieve rows one at a time from the product set of a multi-row query. The syntax for the same is as shown: FETCH {curso
Keyword & Parameter Description: PRAGMA: These keywords signify that the statement is a pragma (i.e. compiler directive). The Pragmas are processed at the compile time, n
If two relations R and S are joined, then the non matching tuples of both R and S are ignored in __________________.
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