Possible Duplicate:
How to make a varchar2 field shorter in Oracle?
在Oracle(9i及以上)
Alter table employee
MODIFY ename varchar2(10);
I want to alter the column ename of table employee from varchar2(30) to varchar2(10)
案例1:如果表格中的数据含有长度低于10焦炭的数值(即它能适合瓦尔查2(10))——是分母允许的吗?
Case 2: if the table has data having ename column containing values which are of length greater than 10 char(i mean it can not fit in varchar2(10)) - is this not allowed by oracle ?
Case 1 : Yes, this works fine.
案例2:由于某些价值太大,因此ORA-01441号错误无法缩短栏目长度。
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