Differences of CHAR and VARCHAR in SQL Server Transact-SQL
Q
What Are the Differences between CHAR and VARCHAR in SQL Server Transact-SQL?
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A
CHAR and VARCHAR are both used to store code page based 1-byte character strings in Transact-SQL. But they have the following main differences:
- CHAR(n) stores character strings with a fixed length, n bytes, storage format.
- VARCHAR(n) stores character strings with a variable length, less than n bytes, storage format.
- If the input string of CHAR(n) has less than n bytes, it will be padded with space characters to become n bytes.
- If the input string of VARCHAR(n) has less than n bytes, it will not be padded with any characters.
- If the input string of CHAR(n) has more than n bytes, it will be truncated to n bytes.
- If the input string of VARCHAR(n) has more than n bytes, it will also be truncated to n bytes.
⇒ Binary String Data Types in SQL Server Transact-SQL
⇐ Differences of CHAR and NCHAR in SQL Server Transact-SQL
2017-04-04, 2374🔥, 0💬
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