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Databases and data warehouses both are databases and both contains number of rows and columns of tables containing data. Data warehouse is really different from databases because d
sql is relationally complete-justify
What is an Index? An index is a small table having only two columns. The first column has a copy of the primary or candidate key of a table and the second column having a set o
What are the comparison operator in SQL? Comparison operator in SQL are =, LIKE and BETWEEN
What are partial, alternate,, artificial, compound and natural key? Partial Key: It is a set of attributes that can uniquely recognize weak entities and that are related to s
Type of database technology
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
What are the function of DBA?
in case of functional dependencies how we get the higher normal form.
Define Thomas write rule Thomas' write rule: The Thomas' write rule is a modification of timestamp-ordering protocol for concurrency control. Assume that transaction T i issue
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