What data types are suitable for SQL databases?
SQL Server supports the following data type’s categories:
- Exact numeric: bit, tinyint, smallint, int, bigint, decimal, numeric, money and smallmoney.
- Approximate numeric: Read and float.
- Date and time: date, DateTime, datetime2, datetimeoffset, smalldatetime, time.
- Character strings:char, varchar, text.
How do you decide which data type to use?
Data Types: The Importance of Choosing the Correct Data Type
- If the data is numeric, favor SMALLINT, INTEGER, BIGINT, or DECIMAL data types.
- If the data is character, use CHAR or VARCHAR data types.
- If the data is date and time, use DATE, TIME, and TIMESTAMP data types.
What are the datatypes in SQL?
Data types in SQL Server are organized into the following categories:
- Exact numerics. Unicode character strings.
- Approximate numerics. Binary strings.
- Date and time. Other data types.
- Character strings.
- bigint. numeric.
- bit. smallint.
- decimal. smallmoney.
- int. tinyint.
How to know what data types are supported in SQL Server?
A driver’s support for SQL data types depends on the level of SQL-92 that the driver complies with. To determine the level of SQL-92 grammar supported by the driver, an application calls SQLGetInfo with the SQL_SQL_CONFORMANCE information type. Additionally, a given driver and data source may support additional, driver-specific SQL data types.
What are the default data types in MySQL?
This chapter describes the most important data types in MySQL and their equivalents or recommended migration targets in SQL Server. The following tables show you the mapping of data types for data migration. The maximum precision is 38, while the default is 18. The default scale is 0.
Do you need a name and data type for a SQL table?
Each column in a database table is required to have a name and a data type. An SQL developer must decide what type of data that will be stored inside each column when creating a table.
How are SQL data types defined in ODBC?
Each ODBC driver exposes only those SQL data types that the associated DBMS defines. Information about how a driver maps DBMS SQL types to the ODBC-defined SQL type identifiers and how a driver maps DBMS SQL types to its own driver-specific SQL type identifiers is returned through a call to SQLGetTypeInfo.