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List the string operations supported by SQL?
1) Pattern matching Operation
2) Concatenation
3) Extracting character strings
4) Converting among uppercase and lower case letters.
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational mo
Sequences Sequences: Automatically produce unique numbers Are sharable Are typically used to make a primary key value Replace application code Speed up t
Example -Find the employee name, salary, department number and average salary of his/her department, for those employees whose salary is more than the average salary of that depart
Consider the following six relation schemes and their corresponding sets of functional dependencies. In each case identify a. All the candidate keys b. The highest normal for
What is schema
Logical Operators Rules of Precedence: Order evaluated Operator 1 All comparison operators 2
Explain the concept of QBE? Query-by-example represents a visual/graphical approach for accessing information in a database by the use of query templates called as skeleton tab
What is database utility? Database utility is the interface among the ABAP/4 Dictionary and the underlying the SAP system.
Shared lock or Read Lock It is requested by a transaction that needs to just read the value of data item. A shared lock on a data item does not permit an exclusive lock
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
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