What is referential integrity ?
Answers were Sorted based on User's Feedback
Answer / rajesh
To establish a parent child relationship between two tables
and to prevent invalid data entry into the table , we make
set of rules on a column is called Referential integrity.
Is This Answer Correct ? | 5 Yes | 0 No |
Answer / mallikarjuna.anumala
A rule defined on a column (or set of columns) in one table
that allows the insert or update of a row only if the value
for the column or set of columns (the dependent value)
matches a value in a column of a related table (the
referenced value). It also specifies the type of data
manipulation allowed on referenced data and the action to
be performed on dependent data as a result of any action on
referenced data.
Is This Answer Correct ? | 3 Yes | 0 No |
A rule defined on a column (or set of columns) in one table
that allows the insert or update of a row only if the value
for the column or set of columns (the dependent value)
matches a value in a column of a related table (the
referenced value). It also specifies the type of data
manipulation allowed on referenced data and the action to
be performed on dependent data as a result of any action on
referenced data.
Is This Answer Correct ? | 1 Yes | 0 No |
wt is the diff b/w greast and max ,least and min? wt is the diff b/w case and decod?
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a table has 2 classifications 1)liabilities 2)earnings this liabitity has 2 elements with 2 input values and the earnings have 2 elements with 2 input values i wrote a query so that my input is liability savings amount1 amount2 xxxx null xxxxxx 0 xxx1 null xxxxx1 0 null yyyy 0 yyyy null yyy1 0 yyy1 my problem is --when i developed a report(d2k) with this data my o/p is liabilities,amount1,savings,amount2 xxxx xxxxxx xxx1 xxxxx1 yyyy yyyy yyy1 yyy1 how could i move this savings,savings values 2 palces up. can any body provide me witha better solution