MySQL查詢由

Question

一週

的日子選擇欄我有以下表結構

ID  IS_SUNDAY  IS_MONDAY   REST DAys.. 

11 Boolean value  Boolean value  Boolean value  

12 Boolean value  Boolean value  Boolean value 

Answer 1

下一頁查詢可以讓你一週的當天選擇欄：

SELECT 
    CASE DAYOFWEEK(CURRENT_DATE) 
    WHEN 1 THEN IS_SUNDAY 
    WHEN 2 THEN IS_MONDAY 
    WHEN 3 THEN IS_TUESDAY 
    WHEN 4 THEN IS_WEDNESDAY 
    WHEN 5 THEN IS_THURSDAY 
    WHEN 6 THEN IS_FRIDAY 
    WHEN 7 THEN IS_SATURDAY 
    END CURRENT_DAY_OF_WEK 
FROM DAYS_TABLE; 

Answer 2

SELECT IS_SUNDAY FROM yourTable WHERE ID = 11 

但我建議大家好好讀讀教程或問這樣簡單的問題面前有一本書。

Answer 3

你可以用它來獲得列名

SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE COLUMN_NAME like '%columnname%' AND TABLE_NAME='table_name';