SQL Reference

Character Strings

A character string is a sequence of bytes. The length of the string is the number of bytes in the sequence. If the length is zero, the value is called the empty string. This value should not be confused with the null value.

Fixed-Length Character Strings

All values of a fixed-length string column have the same length, which is determined by the length attribute of the column. The length attribute must be between 1 and 254, inclusive.


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