 Related Questions TABLESVIEWSINDEXESSYNONYMSSEQUENCESTABLESPACES etc Latest Answer : In Oracle DB Objects are Table View Indexes Sequences Used to generate primary key values Synonym ... Rename is a permanent name given to a table or column whereas Alias is a temporary name given to a table or column which do not exist once the SQL statement is executed. Latest Answer : Rename means give the new name to existed objects alise is use to refrence to objects ... SQL*PLUS is a command line tool where as SQL and PL/SQL language interface and reporting tool. Its a command line tool that allows user to type SQL commands to be executed directly against an Oracle database. Latest Answer : SQL keywords cannot be abbrevated but SQL*PLUS keywords can be abbrevated. ... A bad answer is count them (SELECT COUNT(*) FROM table_name)A good answer is :-'By generating SQL to ANALYZE TABLE table_name COUNT STATISTICS by querying Oracle System Catalogues (e.g. USER_TABLES Latest Answer : If you want to find the number of Rows in table SELECT COUNT(*) FROM EMP;This is valid query ... Oracle does not allow a user to specifically locate tables, since that is a part of the function of the RDBMS. However, for the purpose of increasing performance, oracle allows a developer to create a Latest Answer : Clustering is a method of storing tables that are intimately related and often joined together into the same area on disk. For example, instead of the BOOKSHELF table being in one section of the disk and the BOOKSHELF_AUTHOR table being somewhere else, ... Oracle uses work area to execute SQL statements and store processing information PL/SQL construct called a cursor lets you name a work area and access its stored information A cursor is a mechanism used Latest Answer : Oracle ueses the private area for excute SQL statements and store processing information. The private area is called as CONTEXT AREACURSOR: cursor is a handle or pointer to the context area. ... PL/SQL declares a cursor implicitly for all SQL data manipulation statements, including quries that return only one row. However,queries that return more than one row you must declare an explicit cursor Latest Answer : explicit ... Cursor For Loop is a loop where oracle implicitly declares a loop variable, the loop index that of the same record type as the cursor's record. Latest Answer : The cursor FOR loop is a shortcut to process explicit cursors. Implicit open, fetch, exit, and close occur. The record is implicitly declared. ... What a SELECT FOR UPDATE cursor represent.[ANSWER]SELECT......FROM......FOR......UPDATE[OF column-reference][NOWAIT] The processing done in a fetch loop modifies the rows that have been retrieved by the cursor. A convenient way of modifying the rows is done by a method with two parts: the FOR UPDATE clause in the cursor declaration, WHERE CURRENT OF CLAUSE in an UPDATE or declaration statement. OPEN cursor variable FOR SELECT...StatementCLOSE cursor variable In order to associate a cursor variable with a particular SELECT statement OPEN syntax is used. In order to free the resources used for Latest Answer : • The OPEN-FOR statement associates a cursor variable with a multirow query, executes the query, identifies the result set, and positions the cursor to point to the first row of the result set.• The FETCH statement returns a row from the result ...
Sponsored Links
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
