I have this problem if anyone can help. There is a field (date) in my table (table1) that is a date in the format 3/31/1988 (M/D/y), and my necessity is to define how many days have passed since that date.
如果有人可以提供帮助我有这个问题。我的表(table1)中有一个字段(日期),它是格式为3/31/1988(M / D / y)的日期,我的必要性是定义自该日期起已经过了多少天。
I have tried to give this instruction
我试图给出这个指示
SELECT DATEDIFF(CURDATE(), date) AS days
FROM table1
But it gives back 'null' and I think this happens because the two date formats are different (CURDATE() is YMD.....
但它回馈'null',我认为这是因为两种日期格式不同(CURDATE()是YMD .....
Is it correct? can anyone help me? Thank you in advance
这是对的吗?谁能帮我?先谢谢你
3 个解决方案
#1
8
You can use STR_TO_DATE():
您可以使用STR_TO_DATE():
SELECT DATEDIFF(CURDATE(),STR_TO_DATE(date, '%m/%d/%Y')) AS days
FROM table1
#2
1
Your DATE field should have DATE or DATETIME format to be used as DATEDIFF argument correctly.
您的DATE字段应具有DATE或DATETIME格式,以便正确用作DATEDIFF参数。
Also DATE is MySQL keyword and I am not sure that you can use it as valid field name.
此外,DATE是MySQL关键字,我不确定您是否可以将其用作有效字段名称。
#3
0
You can use this for accurate result
您可以使用它来获得准确的结果
SELECT DATEDIFF(CURDATE(), DATE_FORMAT(FROM_UNIXTIME(UNIX_TIMESTAMP(`date`)), '%Y-%m-%d')) AS days FROM `table1`
#1
8
You can use STR_TO_DATE():
您可以使用STR_TO_DATE():
SELECT DATEDIFF(CURDATE(),STR_TO_DATE(date, '%m/%d/%Y')) AS days
FROM table1
#2
1
Your DATE field should have DATE or DATETIME format to be used as DATEDIFF argument correctly.
您的DATE字段应具有DATE或DATETIME格式,以便正确用作DATEDIFF参数。
Also DATE is MySQL keyword and I am not sure that you can use it as valid field name.
此外,DATE是MySQL关键字,我不确定您是否可以将其用作有效字段名称。
#3
0
You can use this for accurate result
您可以使用它来获得准确的结果
SELECT DATEDIFF(CURDATE(), DATE_FORMAT(FROM_UNIXTIME(UNIX_TIMESTAMP(`date`)), '%Y-%m-%d')) AS days FROM `table1`