Day 47 – SQL Data Types for MySQL, SQL Server, and MS Access
SQL data types represent the type of data that can be stored in a database table column. The most common SQL data types for MySQL, SQL Server, and MS Access are:
- Numeric data types:
- MySQL: INT, BIGINT, FLOAT, DOUBLE, DECIMAL
- SQL Server: INT, BIGINT, FLOAT, REAL, DECIMAL
- MS Access: INTEGER, LONG, SINGLE, DOUBLE, DECIMAL
- Date and time data types:
- MySQL: DATE, TIME, DATETIME, TIMESTAMP, YEAR
- SQL Server: DATE, TIME, DATETIME, SMALLDATETIME, DATETIME2
- MS Access: DATE/TIME
- Character and string data types:
- MySQL: CHAR, VARCHAR, TEXT
- SQL Server: CHAR, VARCHAR, TEXT, NCHAR, NVARCHAR, NTEXT
- MS Access: TEXT, MEMO
- Binary data types:
- MySQL: BINARY, VARBINARY, BLOB
- SQL Server: BINARY, VARBINARY, IMAGE
- MS Access: OLE Object
- Boolean data type:
- MySQL: BOOLEAN, TINYINT(1)
- SQL Server: BIT
- MS Access: YESNO
It is important to note that some data types may be specific to a particular SQL implementation or version, and there may be some variations in data type names or syntax. Additionally, different database management systems may handle data types differently in terms of storage size and performance.
When designing a database schema, it is important to choose appropriate data types for each column based on the nature of the data being stored, the expected size of the data, and any performance or storage considerations.
