I have a table with a DATETIME column. I would like to SELECT this datetime value and INSERT it into another column.
I did this (note: '2011-12-18 13:17:17' is the value the former SELECT gave me from the DATETIME field):
UPDATE products SET former_date=2011-12-18 13:17:17 WHERE id=1
and get
1064 - 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 '13:17:17 WHERE itemid=1' at line 1
Ok, I understand it's wrong to put an unquoted string in there, but is DATETIME just a string in the first place? What do I put in there? All I want is reliably transfer the existing value over to a new datetime field...
EDIT:
The reason I ask is: I have this special definition, DATETIME, and somehow I thought it gives me some security and other advantages when handling dates. Now it seems it is simply a specialized VARCHAR, so to speak.
Thanks for your answers, it seems this is indeed the intended behaviour.
According to MySQL documentation, you should be able to just enclose that datetime string in single quotes, ('YYYY-MM-DD HH:MM:SS') and it should work. Look here: Date and Time Literals
So, in your case, the command should be as follows:
UPDATE products SET former_date='2011-12-18 13:17:17' WHERE id=1
for MYSQL try this
INSERT INTO table1(
myDatetimeField
)VALUES(STR_TO_DATE('12-01-2014 00:00:00','%m-%d-%Y %H:%i:%s');
verification-
select * from table1
output- datetime= 2014-12-01 00:00:00
If you don't need the DATETIME value in the rest of your code, it'd be more efficient, simple and secure to use an UPDATE query with a sub-select, something like
UPDATE products SET t=(SELECT f FROM products WHERE id=17) WHERE id=42;
or in case it's in the same row in a single table, just
UPDATE products SET t=f WHERE id=42;
Try
UPDATE products SET former_date=20111218131717 WHERE id=1
Alternatively, you might want to look at using the STR_TO_DATE (see STR_TO_DATE(str,format)) function.
Source: Stackoverflow.com