MYSQL TIMESTAMP比较

Question

I have a table with a column Time that stores a timestamp value, a column that stores a Name and a column that stores a Status .

I'm trying to find a query to update all entries before a given timestamp like this:

UPDATE `Table` 
SET Status=1
WHERE Name='personname' AND 'Time'<'2012-12-23 18:00:00'

The query is valid but nothing changes.

When trying to show the results of the WHERE part there are no results.

What am I doing wrong?

Answer 1

You're comparing the string literal 'Time' :

'Time'<'2012-12-23 18:00:00'

Try comparing the time column instead:

Time < '2012-12-23 18:00:00'

Or if you have to, surround it in backticks:

`Time` < '2012-12-23 18:00:00'

Live example at SQL Fiddle.

Answer 2

If you are sure about backticks and single quotes and still it doesnt work then try this out,

UPDATE `Table`SET Status=1
WHERE Name='personname' AND 
Time < STR_TO_DATE('2012-12-23 18:00:00','YYYY-MM-DD HH:MI:SS')

Answer 3

Try This:

UPDATE `Table`SET Status=1
WHERE Name='personname' AND 
Time < UNIX_TIMESTAMP(STR_TO_DATE('23-12-2012 18:00:00',' "%d-%m-%Y %h:%i:%s'));