Question

是语法错误吗？

SELECT MEAL_TIMEOFDAY,MEAL_NAME FROM APP.MEAL

WHERE MEAL_TYPE         = ('Cardio')
WHERE MEAL_TIMEOFDAY    = ('Breakfast')

我只需要吃早餐的心脏餐。

Answer 1

如果您的SQL WHERE clause中有多个条件，则必须使用logical operators，例如：

SELECT MEAL_TIMEOFDAY
    , MEAL_NAME
FROM APP.MEAL
WHERE MEAL_TYPE = 'Cardio'
    AND MEAL_TIMEOFDAY = 'Breakfast'

Answer 2

尝试使用以下内容，以上操作无效：

SELECT MEAL_TIMEOFDAY,MEAL_NAME FROM APP.MEAL -- This will work for the condition you provided
WHERE MEAL_TYPE = 'Cardio' AND MEAL_TIMEOFDAY = 'Breakfast'

或者简单地说：

SELECT MEAL_TIMEOFDAY,MEAL_NAME FROM APP.MEAL -- This is a sample with OR
WHERE MEAL_TYPE = 'Cardio' OR MEAL_TIMEOFDAY = 'Breakfast'

Answer 3

SQL查询的结构如下：

SELECT [columns] FROM [table name]
  WHERE [condition one]
     AND [condition 2]

Answer 4

用＆＃34; OR＆＃34;

替换第二个

SQL multiple语句不起作用

4 个答案: