CONVERT or CAST field in SQL Query

Question

I have a TimeStamp field in a MySQL database that I'm trying to pull data from. I'm trying to get it as a string, so I've been using the following query:

select CONVERT(VARCHAR, date_created, 120) from junk;

It throws the error:

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'VARCHAR, date_modified, 120) from junk limit 10' at line 1

Can someone please tell me what I'm doing wrong?

Answer 1

CONVERT() in MySQL is used to convert between different character sets, you need DATE_FORMAT() :

SELECT DATE_FORMAT(date_created, '%Y%m%d %H%i%S')
FROM Junk

Update: Originally had CAST() incorrectly using VARCHAR() , but CAST() will also work:

SELECT CAST(date_created AS CHAR(10))
FROM Junk

DATE_FORMAT() options

Answer 2

如果你想明确格式化为yyyymmdd（sql server中的样式120）

Select DATE_FORMAT(somedate, '%Y%m%d') From SomeTable

Answer 3

In MySql, the CONVERT() function is used to convert existing string types (like varchar) between character sets (like utf-8 or ascii). To format a TimeStamp column, use the FROM_UNIXTIME() function.