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
Related
i have a MySQL's db with 2 DATE columns and when i add a registry the date is saved like this 2018/07/30. The problem is that when i make a get call to the db the value comes like this"2018-07-30T03:00:00.000Z"
I do not need the time part, and i think that the DATE type i have set to the column should not return this kind of value.
I have tried this but it does not work:
"SELECT * FROM patrones WHERE DATE_FORMAT(bd_fRecepcion, '%Y-%m-%d') WHERE bd_SI = 'Si' "
How could i do to get retuned the date part only?
Thanks for your help.
I have a table with a few columns. One of the column is named flight_date is varchar format.
It has a date stored in it in format like '08/12/2015' which is mm/dd/yyyy
I want to run a query which will return me a list of the records with date in 2016.
Can someone help me out please.
Thanks.
In this case, you can use SUBSTR function for just cut last 4 character.
SELECT * FROM yourtable where SUBSTR(flight_date, -4) = '2016'
Though, it is recommended to store date value in appropriate type column and not in varchar.
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')
I have column inside the database called proxima_cal and its varchar(5) that has a value like 11/16 that represent month/year and I need to select this table.
WHERE proxima_cal BETWEEN "11/16" AND "11/19"
as a varchar BETWEEN doesn't work so what I have to do to mysql conceder this column as date and get correct result ?
You can use the STR_TO_DATE method, something like:
WHERE STR_TO_DATE(CONCAT('01/', proxima_cal), '%d/%m/%y') BETWEEN '2016/11/01' AND '2019/11/01'
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');