I know how using STR_TO_DATE(str,fmt); will change the format of a specific string, but if I have a column of all different dates in a text format (ex. 1/11/2016, 1/25/2016, 6/27/2015...) how do I convert all of the data in the column to DATE format? From everything I'm reading, it seems you need to provide the exact value to be converted each time.
You can use multiple ifnull fuction for this.
select ifnull(STR_TO_DATE(a,'%Y-%m-%d'),sTR_TO_DATE(a,'%Y-%d-%m')) from [YourTable];
update [YourTable] set timestamp=ifnull(STR_TO_DATE([Colum],'%Y-%m-%d'),sTR_TO_DATE(a,'%Y-%d-%m')) ;
Hope this helps.
Thanks Mark B.
str_to_date(yourfield, '%d/%m/%Y'), done. you can use fields in a record as part of the update query, e.g. update foo set bar=bar+1 is completely legitimate/valid.
So I used:
update [My_Table]
set Create_Date = str_to_date(Create_Date, '%d/%m/%Y')
Related
I'm trying to select with reference to one column changing its time in MySQL, but I don't know how.
How will I do it?
Example:
Time original: 2015-07-20 22:10:52
Updated: 2015-07-20 23:59:59
You can use timestamp to join the current timestamp's date with the time you want to set:
UPDATE mytable
SET mytimestamp = TIMESTAMP(DATE(mytimestamp), '23:59:59')
To update with no reference to previous column value, it's no different from other columns. To update with it, and based on certain part (second, month, year, whatever), you can use DATE_ADD or DATE_SUB function. Any other function in the same page might be useful, too, depending on your needs.
It doesn't matter what type of column you have, your table can be modified with a standard UPDATE statement.
You can also use the some special time/date functions to help you get the right format.
UPDATE mytable SET mytimestamp = mytimestamp::date + '23:59:59'::time;
it should work.
I am trying to fix an order problem for a column in a SQL table. The column has dates but with the type varchar, and they are in this format: mm/dd/yy. I did not make it this way, the person behind me did and left.
How do I change all the entries to be the format yyyy/mm/dd? Once I put them in this format I will make a new column of type date and I will convert all the values and put them in there. My question is, which command do I use to change these dates? They're all in the 2000s so I can just add "20" to all the year parts.
Do it like this, using STR_TO_DATE:
Add a date column (called newdate for example)
Execute this:
UPDATE table SET newdate = STR_TO_DATE(olddate, '%m/%d/%y');
Test it
Drop the old column and optionally rename the new one to suit.
Make sure you use %y and not %Y: The lower-cased version works with 2-digit years.
You can do it with string manipulations:
update t
set col = concat('20', right(col, 2), '/', left(col, 5))
where col like '%/%/%'
Use STR_TO_DATE:
STR_TO_DATE(MyDateCol, '%m/%d/%y')
I have a table in MYSQL of which 3 columns have dates and they are formatted in the not desired way.
Currently I have: mm/dd/yyyy and I want to change those dates into dd/mm/yyyy.
Table name is Vehicles and the columns names are:
CRTD
INSR
SERD
Your current datatype for your column is not date right? you need to convert it to date first using STR_TO_DATE() and convert back to string
SELECT DATE_FORMAT(STR_TO_DATE(colName, '%c/%d/%Y'), '%d/%c/%Y')
FROM table1
SQLFiddle Demo
try this:
select date_format(curdate(), '%d/%m/%Y');
In you case you have to use this query.If all three columns are of datetime type
select date_format(CRTD, '%d/%m/%Y'),
date_format(INSR, '%d/%m/%Y'),
date_format(SERD, '%d/%m/%Y')
From yourTable
You can use the date_format() function to format your dates any way you want.
If you want to change the format for every date on any database you work with, you should change the value of the date_format system variable.
UPDATE Vehicles SET yourdatecolumn=DATE_FORMAT(STR_TO_DATE(yourdatecolumn, '%c-%d-%Y'), '%d-%c-%Y')
I am working on a database which has date fields in 'yyyy-dd-mm hh:mm' format, I used STR_TO_DATE to change the field to 'yyyy-mm-dd hh:mm' but it is giving back an error.
Query:
UPDATE transaction
SET time_creation = STR_TO_DATE(time_creation, '%Y-%m-%d %H:%i');
Error:
Incorrect datetime value: '2005-08-06 15:57:00' for function str_to_date
I did a check with the following query too:
SELECT
time_creation,
STR_TO_DATE(time_creation,'%Y-%m-%d %H:%i') AS DATE_FORMATTED
FROM transaction;
and got NULL in the DATE_FORMATTED column for date values such as
'2007-22-11 15:32' but worked fine for '2007-09-11 13:12'. I don't understand what exactly is happening. Any help is appreciated.. thank you.
You have
STR_TO_DATE(time_creation,'%Y-%m-%d %H:%i')
and you give '2007-22-11 15:32' which means 'yyyy-dd-*mm* hh:mm'.
Sql is trying to parse a date that contains the number 22 as month...
Abyway
SELECT STR_TO_DATE('2005-08-06 15:57:00', '%Y-%m-%d %H:%i');
works fine in my mysql server.
First, you need to share the table definition with us. It sounds like the column type for the time_creation field is a VARCHAR and not a DATETIME. So you really should not try to store the result back into the same field. You want to save it into a valid DATETIME field so that the intrinsic column type is correct.
Second, it sounds like some of your values are stored as YYYY-DD-MM and some as YYYY-MM-DD. Is that the case? If it is, you'll need more logic in order to differentiate between the values that are already correct and those that are not. If they are mixed, however, you are in a bit of a pickle because how do you know the proper way to interpret 2012-01-03?
EDIT:
Create a new DATETIME field (for the example I just use new_time_creation) and update like this:
UPDATE transaction SET new_time_creation = STR_TO_DATE(time_creation, '%Y-%d-%m %H:%i');
I decleared the column as "datetime",which failed to restore value like above.
2008-7 isn't a date. 2008-7-1 is a date (the first of July). If you want to store values like 2008-7, you'll want a character field.
Do you need to clean up the data?
make it a varchar
update t set d = concat(d, '-1')
change it to a date type