INSERT new data , UPDATE new data , DELETE existing data (basically modify the data).
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Data in a database table can be inserted by the help of Data Manipulation Language, by writing query in language like Sql.
The word "manipulation" refers to the exertion of some sort of influence for the manipulator's gain. Synonyms for the word include control or handling.
Yes you can. You can create queries that do calculations. You can write code for programs to do calculations in a database. Doing calculations is a significant element of what you do with a database, so yes you can do them within a database.
In database the data is stored in tables called database tables. These tables have rows and columns. Each row is called a tuple.
its a unique key use to identify data in database