ç´æ¥ç¨char(é¿åº¦)å®ä¹å段类åå°±å¯ä»¥äºã
ä¾å¦ä¸åè¯å¥å建ä¸å¼ 表T6å ¶ä¸å段col1被å®ä¹ä¸ºåºå®é¿åº¦ä¸º10ä½çææ¬ç±»åï¼
create table T6 (id counter primary key,col1 char(10),col2 long);
å建T6表并æå¼åï¼col1è¾å ¥âabcâç³»ç»ä¼èªå¨è¡¥ä¸7ä¸ªç©ºæ ¼