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DBMS SQL Datatype

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SQL (Structured Query Language) is a programming language that is used to define, manipulate, and control the data stored in a database management system (DBMS). SQL includes a set of data types that are used to specify the type and size of the data that can be stored in the database.

The following is a brief overview of the different SQL data types and their uses:

  • Numeric data types: Numeric data types are used to store numerical data in the database. SQL includes several numeric data types, including INTEGER, BIGINT, SMALLINT, NUMERIC, DECIMAL, and FLOAT. The INTEGER data type is used to store whole numbers, while the NUMERIC and DECIMAL data types are used to store precise decimal numbers. The BIGINT and SMALLINT data types are used to store larger and smaller integers, respectively. The FLOAT data type is used to store approximate decimal numbers with a floating point.
  • String data types: String data types are used to store character strings in the database. SQL includes several string data types, including CHAR, VARCHAR, and TEXT. The CHAR data type is used to store fixed-length character strings, while the VARCHAR data type is used to store variable-length character strings. The TEXT data type is used to store large amounts of text data.
  • Date and time data types: Date and time data types are used to store date and time values in the database. SQL includes several date and time data types, including DATE, TIME, TIMESTAMP, and INTERVAL. The DATE data type is used to store date values, the TIME data type is used to store time values, and the TIMESTAMP data type is used to store date and time values. The INTERVAL data type is used to store time intervals.
  • Boolean data type: The Boolean data type is used to store true or false values in the database. The Boolean data type is represented by the BOOLEAN keyword in SQL.
  • Binary data types: Binary data types are used to store binary data, such as images, audio, and video, in the database. SQL includes several binary data types, including BINARY, VARBINARY, and BLOB. The BINARY data type is used to store fixed-length binary data, while the VARBINARY data type is used to store variable-length binary data. The BLOB data type is used to store large amounts of binary data.

Overall, SQL data types are an essential part of the SQL language, and they are used to specify the type and size of the data that can be stored in the database. Each SQL data type has its own specific purpose and use cases, and they are used together to store and manage the data in the database and to support a wide range of applications and use cases.