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Differentiate between join and outer join?
Outer joins return all rows from at least one of the tables or views mentioned within the FROM clause, as long as those rows get together any WHERE or HAVING search conditions.
All rows are retrieved from the left table referenced along with a left outer join, and all rows from the right table referenced in a right outer join. All rows from both tables are returned within a full outer join.
A table can be joined to itself within a self-join.
The following variant of the primary copy asynchronous-update replication protocol has been proposed for totally replicated systems. (a) A transaction executing at site A updat
Define instance and schema? Instance: Collection of data kept in the data base at a particular moment is known as an Instance of the database. Schema: The o
What should be declared explicitly in the corresponding ABAP/4 Statements to access internal tables without header lines & why? Work Area. This is needed as the Work Area is
What is a primary index? A primary index is an index whose search key also explains the sequential order of the file.
What is data block? Data Block - In oracle the data blocks are referred to as tablespaces. A tablespace is an fields of disk consisting of one or more disk files. A tablespace
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what is natural join?
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
Eliminate Repeating Groups The problem is, "Find out the list of employees, who knows DB2". For this problem we require to perform an awkward scan of the list looking for re
Why do so various organizations use MySQL? Advantages: Open source Highly efficient Offers a high scalability in terms of size and connectivity. Highly prote
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