一隅桥畔

摘要： 当前显示 SQL> select * from test; A B C you pig are 通过修改sys.col$表来改变表中列的顺序 SQL> SELECT owner,object_name,object_id FROM ALL_OBJECTS WHERE OBJECT_NAME='TES 阅读全文

摘要： BigDecimal a = new BigDecimal(10); BigDecimal b = new BigDecimal(2); if(a.compareTo(b) == 0){ System.out.println("a等于b"); } if(a.compareTo(b) == 1){ S 阅读全文