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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.
Use inheritance as an implementation technique when you are going to use inheritance as an implementation technique, you can achieve same goal in a safer way by making one cla
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
Do NOT use the timestamp type. Use separate date and time data types only. Figure out how to define an SQL insert statement that uses built-in SQL (or MySQL) functions to define
coventions for displaying an ER schema as ER diagram
State The position of object at any moment is called state. An object can have many states depend upon time. After receiving some input instructions, the object can change its
Modular growth: In distributed environments, it is simple to expand. Latest sites can be added to the network without affecting the operations of other sites, as they are somewhat
Super keys of a relation can have extra attributes. Candidate keys are minimal super key, i.e. such a key have no extraneous attribute. An attribute is known as extraneous if even
Drawbacks of Database systems ?
explain five responsibilities of DBA?
How to reduce data redundency
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