This is my MySQL Code:
UPDATE student SET birthDate = STR_TO_DATE(birthDate, '%M %d,%Y');
INSERT INTO student (`birthDate`) VALUES ('June 10,1997');
But it displays an error:
Error code 1292, SQL state 22001: Data truncation: Incorrect date
value: 'June 10,1997' for column 'birthDate' at row 1
SQL uses a very specific date format, which is 'YYYY-MM-DD'.
You can insert it as text once it's in that format (E.g no need for STR_TO_DATE).
Example: '1997-06-10'
If you want to insert a date into the column, use a proper date syntax:
INSERT INTO student (`birthDate`)
VALUES ('1997-06-10');
INSERT INTO student SET birthDate='1997-06-10'
STR_TO_DATE() returns a properly formatted date based on the provided string and string format.
The following INSERT would work just fine
INSERT INTO student (`birthDate`) VALUES (STR_TO_DATE('June 10,1997', '%M %d,%Y'));
Because SELECT STR_TO_DATE('June 10,1997', '%M %d,%Y') returns 1997-06-10
The update query you provided would not work if the birthDate field is a date field, because there is no way it could already contain a date in the format m d,Y (you are updating the column values in place)
If you had a column of dates in a varchar column (example, birthDate_mdY) in that format, then you could convert them to a date field like this
UPDATE student SET birthDate = STR_TO_DATE(birthDate_mdY, '%M %d,%Y')
Related
I have customers data translated into DB table in which few cell values in column type Varchar, contains date and few doesnt. The ones that contains Date in certain format, need to be converted into another one which will be further used for data analysis jobs. I tried below query but it shows errors for the cells which doesnt have date. How do I resolve this?
Basically I want to strip off the actual time and append 000000 in place of actual time, along with the date.
Query:
UPDATE Table1
SET C1 = DATE_FORMAT(C1,'%Y%m%d000000')
WHERE DATE_FORMAT(C1,'%Y%m%d%H%i%s') AND C1 IS NOT NULL;
Error:
Code : 1292
Truncated incorrect datetime value: 'EVN'
You need to use STR_TO_DATE() to parse the date that's in the VARCHAR column.
You can use a regular expression to test if the column contains a date in MM/DD/YY format.
UPDATE Table1
SET C1 = DATE_FORMAT(STR_TO_DATE('%m/%d/%y', C1), '%Y%m%d000000')
WHERE C1 RLIKE '^[01][0-9]/[0-3][0-9]/[0-9][0-9]$'
CREATE TABLE orders(
order_id INTEGER PRIMARY KEY,
customer_id INTEGER,
order_date DATE,
ship_date DATE
);
INSERT INTO orders
VALUES
(1, 1200, '2013-23-10', '2013-28-10');
Is there anything wrong with the above code?
You are using 'YYYY-dd-MM' format whereas you need to use 'YYYY-MM-dd', try the following:
INSERT INTO orders VALUES (1, 1200, '2013-10-23', '2013-10-28');
Date format is 'YYYY-MM-DD'.
23 and 28 are not valid values for MM month component.
The error returned by MySQL is expected behavior.
Nothing necessarily wrong with what you are doing, if you are want MySQL to return an error message.
If you are wanting the statement execution to be successful, and to add a row to orders table, supply valid date values for the DATE columns.
Either change the literal values to match the format expected by MySQL, or use STR_TO_DATE function to convert the string from a specified format.
... , '2013-10-23' , ...
or
... , STR_TO_DATE('2013-23-10','%Y-%d-%m') , ...
I have an INSERT query in ruby and I'm passing parameters from another table. One of the parameters is a timestamp value, for example: 2015-11-22 12:57:06 +0000 which is stored in a variable name created_at (of type Time)
insert into my_tbl set
name = '#{name}',
created_at = #{created_at}
and I'm always getting errors while trying to insert it.
I've tried to convert it to string, and to use str_to_date function, but the problem is that I have a timestamp value.
How can I insert the value to the table?
INSERT INTO my_tbl (name, created_at)
VALUES (name, created_at.to_s.split(' +').first)
Format the input in mysql from chat and from ruby program insert and format in this chat with the sale format
Update:
In mysql :
Select to_date('"+varchar+"','dd/mm/yyyy'......
In Ruby:
Varchar='01/12/2015"
Of course with format
Good Morning All;
I currently have a MySQL table where there are 3 date fields (Columns) that were loaded as strings in this format 20140101 YYYYmmdd. I would like to convert this to a date format 2014/01/01 YYYY/mm/dd. Can someone please provide a simple sql syntax that would alter the table to a date format from a string and change the column to display the dates like this 2014/01/01 and not like 20140101. Thanks to all
Try this:
date_format(str_to_date(datecolumn, '%Y%m%d'),'%Y/%m/%d')
If you just want to reformat the values in the VARCHAR column, assuming that the column with sufficient length e.g. VARCHAR(10), and all the values are eight characters in length...
You could do something like this:
UPDATE mytable t
SET t.mycol = CONCAT( LEFT( t.mycol ,4)
, '/'
, SUBSTR( t.mycol ,5,2)
,'/'
, SUBSTR( t.mycol ,7,2)
)
WHERE CHAR_LENGTH(t.mycol) = 8
We want something in the statement that will prevent the statement from "working" a second time, if it's inadvertently re-run. It doesn't have to be CHAR_LENGTH. We might want to include a check that the value doesn't already contain a slash character AND t.mycol NOT LIKE '%/%'.
But why on earth are "date" values being stored in character columns, rather than in DATE datatype, which is custom designed for storing and working with date values?
ALTER TABLE mytable MODIFY mycol DATE ... ;
(If the column is defined as NOT NULL, has a default value, has a comment, those attributes can be retained, they need to be included in the new column specification, e.g.
ALTER TABLE mytable MODIFY mycol DATE NOT NULL COMMENT 'creation date';
Note that DATE columns do not have a "format" per se. When converting to string, MySQL uses date format '%Y-%m-%d'. And MySQL expects string literals representing date values to be in that same format. To get a value from a DATE column converted to string in format 'yyyy/mm/dd'.
SELECT DATE_FORMAT(date_col,'%Y/%m/%d') AS date_col
To get a string value in that format converted to DATE datatype
SELECT STR_TO_DATE('2015/06/01','%Y/%m/%d')
I have one column date1 which is varchar type
I want this column to date type.
I tried changing field but all date is converted to 0000-00-00.
format is dd-mm-yyyy but in varchar.
How can I convert the same date format but with date format using sql queries or similar but at database level ?
UPDATE `table`
SET `column` = str_to_date( `column`, '%d-%m-%Y' );
More about STR_TO_DATE function.
Since your column name is date1, you can replace column with date1 in the above syntax, and the code shall be:
UPDATE `table`
SET `date1` = str_to_date( `date1`, '%d-%m-%Y' );
The other answers here are risky, because if they go wrong you'll lose your data. A safer way to do this is to create a new field on your database with a DATE (or DATETIME if you need time as well) format, then to run a query like
UPDATE `table` SET `my_new_date_field` = STR_TO_DATE( `my_old_data_field`, '%d/%m/%Y');
In this way, if the %d/%m/%Y bit is wrong, you won't lose your data.
Once you're happy, you can delete the old data field and rename the new one.
use STR_TO_DATE Function of MySQL
FIRST you will need to update the value in date format.
UPDATE `tbl` SET `date1` = STR_TO_DATE(`date1`, '%d-%m-%Y') WHERE 1=1
THEN Convert the field to date.
Most importantly remember to insert date as Y-m-d format, after then.