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Introduction
Oracle 9i- it was made public in the year 2001 with over 400 features, and graphics, it has merged the traditional business with modern internet applications (both business model and their operation).It is known for its strength in offering performance, scaling, and availability in hosted services exhibited in any software. A real application clusters is a computer-cluster database. In Oracle 9i, Real Application Clusters substituted the Oracle Parallel Server.
Oracle 10g- This database became the first RDBMS release from Oracle Corporation after Oracle 9i that advanced Grid computing technology. Besides these multiple features and advancements, Oracle 10g released resolved the bugs reported from the previous edition of databases like oracle 9i. Major language features included continuing expression functionality support, flashback operations support; recycle bin, and performance improvements. With the rising fame of 10g versions first release, when it became successful then oracle released second edition of 10g in 2005.
Oracle 11g- This is latest released databases of oracle, it was released in 2009. Since its inception, Oracle 11g has become the topic of discussions amongst the database developers and engineers, corporate that are actually utilizing and advancing their operation. Oracle 11g has well equipped with the performance oriented features, language enhancements and logical programming recommendations.
LIKE Operator You use the LIKE operator to compare the character value to a pattern. The Case is significant. LIKE returns the Boolean value TRUE when the character patterns mat
Ensuring Backward Compatibility The PL/SQL Version 2 permits some abnormal behavior which Version 8 disallows. Particularly, Version 2 permits you to (i) Make the forw
Example of GROUPBY Operator Example: How many students sat each exam, using GROUP BY, NATURAL LEFT JOIN, and COALESCE SELECT CourseId, COALESCE (n, 0) AS n FROM COURS
If two relations R and S are joined, then the non matching tuples of both R and S are ignored in __________________.
Initializing and Referencing Collections Until you initialize a collection, a nested table or varray is automatically null (i.e. the collection itself is null, not its elements)
Restriction in SQL Syntax: SELECT DISTINCT StudentId FROM IS_CALLED WHERE Name = 'Boris' The WHERE clause operates on the result of the FROM clause in analogo
Parameter Aliasing To optimize the subprogram call, the PL/SQL compiler can decide between the two techniques of the parameter passing. With the by-value techniques, the v
Using COUNT The COUNT returns the number of elements that a collection presently contains. For instance, when a varray projects contains 15 elements, then the following IF con
GOTO Statement The GOTO statement branches to a label unconditionally. The label must be exclusive within its scope and should precede an executable statement or a PL/SQL block.
Datatype Conversion At times it is necessary to convert a value from one datatype to another. For e.g. if you want to inspect a rowid, you should convert it to a character stri
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