Question

what is Colem and name there types​

Answer 1

Answer:

Its Column:-

The database fields in a table are the names of the columns where the different pieces of data are stored. The fields should be defined to determine what kind of data they can contain. Some of the common field types are: Character, Boolean, Integer, Decimal, Date, and Timestamp.

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Answer 2

In a relational database, a column is a set of data values of a particular simple type, one value for each row of the database.[1] A column may contain text values, numbers, or even pointers to files in the operating system.[2] Some relational database systems allow columns to contain more complex data types; whole documents, images or even video clips are examples.[3] A column can also be called an attribute.

Each row would provide a data value for each column and would then be understood as a single structured data value. For example, a database that represents company contact information might have the following columns: ID, Company Name, Address Line 1, Address Line 2, City, and Postal Code. More formally, each row can be interpreted as a relvar, composed of a set of tuples, with each tuple consisting of the relevant column and its value, for example, the tuple ('Address 1', '12345 West Example Street').