I'm not entirely sure what you're experiencing, but don't you need data types for (2) and (3)? Perhaps MySQL defaults to INT, but I'm not sure.
Check out http://www.mysql.com/doc/en/String_functions.html for more info, but look into the above item first. I have a sneaking suspicion that's your problem. Edward Dudlik Becoming Digital www.becomingdigital.com ----- Original Message ----- From: "Hu Qinan" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, 03 June, 2003 03:05 Subject: Constants required in String functions? Dear all, I am wondering whether constant arguments are required in string functions, e.g. Substring(str, pos, len). Given MyTable: ... MyString TEXT, (muti-byte characters) MyPos UNSIGNED(10), MyLength UNSIGNED(10). While (1) works well, (2) would return strange characters. (1)SELECT SUBSTRING(MyString, 1, 1) (2) SELECT SUBSTRING(MyString, MyPos, MyLength) FROM MyTable What's wrong with SQL (2)? -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
