How do I know if my SQL Server is Unicode or Unicode?
To Make sure your database is Unicode, please check the value of “NLS_CHARACTERSET” Parameter and it should be AL32UTF8 or AL16UTF16 from above list.
What encoding is varchar?
VARCHAR is stored as regular 8-bit data, NVARCHAR strings are stored in the database as UTF-16. UTF-8 (UCS Transformation Format—8-bit) is a variable-width encoding that can represent every character in the Unicode character set.
What is DB collation SQL Server?
What is a SQL Server collation? A collation is a configuration setting that determines how the database engine should treat character data at the server, database, or column level.
Can we change SQL Server collation?
The server-level collation for SQL Server Express LocalDB is SQL_Latin1_General_CP1_CI_AS and cannot be changed, either during or after installation.
Why varchar is used in SQL?
As the name suggests, varchar means character data that is varying. … SQL varchar usually holds 1 byte per character and 2 more bytes for the length information. It is recommended to use varchar as the data type when columns have variable length and the actual data is way less than the given capacity.
What does varchar 20 mean?
The data type of varchar is Variable-length with non-Unicode character data. The storage size is the actual length of data entered + 2 bytes. • For varchar (20): The max storage size is: 20*1 byte +2 bytes=22 bytes; •
Is SQL_Latin1_General_CP1_CI_AS the same as Latin1_General_CI_AS?
The SQL_Latin1_General_CP1_CI_AS collation is a SQL collation and the rules around sorting data for unicode and non-unicode data are different. The Latin1_General_CI_AS collation is a Windows collation and the rules around sorting unicode and non-unicode data are the same.
What is the difference between Unicode and non-Unicode?
The only difference between the Unicode and the non-Unicode versions is whether OAWCHAR or char data type is used for character data. The length arguments always indicate the number of characters, not the number of bytes.