1.Column ‘SNO‘ in field list is ambiguous2.the right syntax...
,类型是立定跳远,学号是类型为800米的所有学号SQLLEFT JOIN 语法: SELECTcolumn_name(s) FROM table1LEFT JOIN table2ON table1.column_name=table2.column_name; 实例: SELECTsno,category, b.dict_value weight from p_test a LEFT orcale 查询语句(多种查询语句) ...