Answer Posted / divya

relational calculus is a declarative way to specify the queries,whereas relational algebra is a procedural way to specify the queries.

What is the database url?

1151

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What is the difference between primary key, foreign key and candidate key?

1162

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if i want to display the name of students such that to which city they belong must have count greaer than two

2304

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Why do we need distributed database?

1043

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how can we view column head in first page but not in remaining pages?

2080

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Explain entity set?

1061

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How many types of locks are present in a database?

1178

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What are indexes in oracle?

1128

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What do you mean by cluster and non cluster index?

1126

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Is it good to store images in database?

1046

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Differentiate between unique key and foreign key?

1069

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What is difference between data and database?

1160

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There are three servers are run by Oracle, MS Access and .Net. What are the procedure fetching the values of two variables from two servers among these?

2205

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Write a query to retrieve for many to many relationships?

1056

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What is a database call?

1131

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