Hướng dẫn varchar mysql
11.3.2 The CHAR and VARCHAR Types The The The length of a Values in In contrast to If strict SQL mode is not enabled and you assign a value to a For The following table illustrates the differences between
The values shown as stored in the last row of the table apply only when not using strict SQL mode; if strict mode is enabled, values that exceed the column length are not stored, and an error results. If a given value is stored into the
Values in
MySQL collations have a pad attribute of To determine the pad attribute for a collation, use the For nonbinary strings ( For those
cases where trailing pad characters are stripped or comparisons ignore them, if a column has an index that requires unique values, inserting into the column values that differ only in number of trailing pad characters results in a duplicate-key error. For example, if a table contains |