Second step at defining type sid in sql, PL-SQL Programming

Assignment Help:

Second Step at defining type SID in SQL

CREATE TYPE SID AS VARCHAR(5) ;

Explanation:

TYPE SID announces that a type named SID is being defined to the system.
AS VARCHAR(5) defines SID as a distinct type, whose values are represented by values of type VARCHAR(5). In this form of type definition the given representation must be a system- defined type.

Under this definition, SID('S1') is exactly equivalent to the same expression in Tutorial D, and the SQL expression CAST(s AS VARCHAR(5)), where s is a value of type SID, is equivalent to Tutorial D's THE_C(s). However, we have no way of further constraining the string values representing student identifiers; so SID('34x.1'), for example, also denotes a value of type SID, as does SID(' ').

Related Discussions:- Second step at defining type sid in sql

Predefined exceptions, Predefined Exceptions The internal exception is ...

Predefined Exceptions The internal exception is raised implicitly whenever your PL/SQL program exceeds a system-dependent limit or violates an Oracle rule. Each & every Oracle

Union and or - sql, UNION and OR - SQL SQL supports UNION explicitly b...

UNION and OR - SQL SQL supports UNION explicitly but differently from the way it supports JOIN explicitly. As we have seen, JOIN is used exclusively within the FROM clause, su

Using prior and next - collection method, Using PRIOR and NEXT The PRI...

Using PRIOR and NEXT The PRIOR(n) returns the index number that precede index n in a collection. The NEXT(n) returns the index number which succeed the index n. If n has no pr

Write a pl-sql program using the implicit cursor, Question: a) Given th...

Question: a) Given the following relation: Location(loc_id, bldg_code, room, capacity) The underlined field is a primary key. (i) Write a PL/SQL program using the impl

Loop statements, LOOP Statements The LOOP statements execute a series o...

LOOP Statements The LOOP statements execute a series of statements at multiple times. The loops enclose the series of statements that is to be repeated. The PL/SQL provides typ

Need azure crm web application with authentication, Need Azure CRM Web Appl...

Need Azure CRM Web Application with two-factor authentication We presently have a CRM-like database stored on MS Azure that we presently access over an MS Access application. It

%rowcount, %ROWCOUNT When its cursor or cursor variable is opened, the...

%ROWCOUNT When its cursor or cursor variable is opened, the %ROWCOUNT is zeroed. Before the first fetch, the %ROWCOUNT yields 0. Afterward, it yields the number of rows fetche

Explicit cursor attributes, Explicit Cursor Attributes The cursor varia...

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

Transaction context, Transaction context As the figure shows, the majo...

Transaction context As the figure shows, the major transaction shares its context with the nested transactions, but not with the autonomous transactions. Similarly, If one aut

Cursor variables in pl sql, Cursor Variables: To execute the multi-...

Cursor Variables: To execute the multi-row query, the Oracle opens an unnamed work region that stores the processing information. You can use an explicit cursor that names

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages