Relational Algebra Relational algebra is a procedural query language. It gives a step by step process to obtain the result of the…
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sql introduction
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SQL SQL stands for Structured Query Language. It is used for storing and managing data in relational database management system (RDMS). It…
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Transaction The transaction is a set of logically related operation. It contains a group of tasks. A transaction is an action or…
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File Organization Storage There are different ways of storing data in the database. Storing data in files is one of them. A…
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Merge Join Algorithm The merge joins are used for performing natural joins and equi-joins for given relations r and s. We use…
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Multiple Granularity Let’s start by understanding the meaning of granularity. Granularity: It is the size of data item allowed to lock. Multiple…
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Relational Calculus There is an alternate way of formulating queries known as Relational Calculus. Relational calculus is a non-procedural query language. In…
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SQL JOIN As the name shows, JOIN means to combine something. In case of SQL, JOIN means “to combine two or more…
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Transaction property The transaction has the four properties. These are used to maintain consistency in a database, before and after the transaction.…
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Foreign Key in DBMS A foreign key is different from a super key, candidate key or primary key because a foreign key…