I'm importing a column of strings with partial dates into a csv file.
During import, is there a way to convert strings with the format "September 23" into a DATETIME format, using the partial date to populate month, day and year, and the time of insert as the time?
Edit: I clarified the question, so the below answers aren't quite relevant.
https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_str-to-date
I think you can try DATE_FORMAT().
mysql> SELECT STR_TO_DATE('OCT 1, 2013','%M %d,%Y'); // -> '2013-10-01'
STR_TO_DATE-returns a DATETIME value if the format string contains both date and time parts, or a DATE or TIME value if the string contains only date or time parts. If the date, time, or datetime value extracted from str is illegal, STR_TO_DATE() returns NULL and produces a warning.
Refer this link and this also.
This is ugly, but it works. The main problem was creating the year and time, and also dealing with single numeric values for the days of the month. CONCAT_WS is the glue in this scenario:
STR_TO_DATE(CONCAT_WS(',','September 5',YEAR(NOW()), TIME(NOW())), '%M %e, %Y, %T')
Returns:
2012-09-05 11:51:46
Related
I have a string column which acts as a date and I want to select it as a DATE.
Is it possible?
My sample data format would be:
month/day/year -> 12/31/2011
As was told at MySQL Using a string column with date text as a date field, you can do
SELECT STR_TO_DATE(yourdatefield, '%m/%d/%Y')
FROM yourtable
You can also handle these date strings in WHERE clauses. For example
SELECT whatever
FROM yourtable
WHERE STR_TO_DATE(yourdatefield, '%m/%d/%Y') > CURDATE() - INTERVAL 7 DAY
You can handle all kinds of date/time layouts this way. Please refer to the format specifiers for the DATE_FORMAT() function to see what you can put into the second parameter of STR_TO_DATE().
STR_TO_DATE('12/31/2011', '%m/%d/%Y')
Here's another two examples.
To output the day, month, and year, you can use:
select STR_TO_DATE('14/02/2015', '%d/%m/%Y');
Which produces:
2015-02-14
To also output the time, you can use:
select STR_TO_DATE('14/02/2017 23:38:12', '%d/%m/%Y %T');
Which produces:
2017-02-14 23:38:12
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html
use the above page to refer more Functions in MySQL
SELECT STR_TO_DATE(StringColumn, '%d-%b-%y')
FROM table
say for example use the below query to get output
SELECT STR_TO_DATE('23-feb-14', '%d-%b-%y') FROM table
For String format use the below link
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-format
The following illustrates the syntax of the STR_TO_DATE() function:
STR_TO_DATE(str,fmt);
The STR_TO_DATE() converts the str string into a date value based on the fmt format string. The STR_TO_DATE() function may return a DATE , TIME, or DATETIME value based on the input and format strings. If the input string is illegal, the STR_TO_DATE() function returns NULL.
The following statement converts a string into a DATE value.
SELECT STR_TO_DATE('21,5,2013','%d,%m,%Y');
Based on the format string ‘%d, %m, %Y’, the STR_TO_DATE() function scans the ‘21,5,2013’ input string.
First, it attempts to find a match for the %d format specifier, which
is a day of the month (01…31), in the input string. Because the
number 21 matches with the %d specifier, the function takes 21 as the
day value.
Second, because the comma (,) literal character in the format string
matches with the comma in the input string, the function continues to
check the second format specifier %m , which is a month (01…12), and
finds that the number 5 matches with the %m format specifier. It
takes the number 5 as the month value.
Third, after matching the second comma (,), the STR_TO_DATE()
function keeps finding a match for the third format specifier %Y ,
which is four-digit year e.g., 2012,2013, etc., and it takes the
number 2013 as the year value.
The STR_TO_DATE() function ignores extra characters at the end of the input string when it parses the input string based on the format string. See the following example:
SELECT STR_TO_DATE('21,5,2013 extra characters','%d,%m,%Y');
More Details : Reference
I have a string column which acts as a date and I want to select it as a DATE.
Is it possible?
My sample data format would be:
month/day/year -> 12/31/2011
As was told at MySQL Using a string column with date text as a date field, you can do
SELECT STR_TO_DATE(yourdatefield, '%m/%d/%Y')
FROM yourtable
You can also handle these date strings in WHERE clauses. For example
SELECT whatever
FROM yourtable
WHERE STR_TO_DATE(yourdatefield, '%m/%d/%Y') > CURDATE() - INTERVAL 7 DAY
You can handle all kinds of date/time layouts this way. Please refer to the format specifiers for the DATE_FORMAT() function to see what you can put into the second parameter of STR_TO_DATE().
STR_TO_DATE('12/31/2011', '%m/%d/%Y')
Here's another two examples.
To output the day, month, and year, you can use:
select STR_TO_DATE('14/02/2015', '%d/%m/%Y');
Which produces:
2015-02-14
To also output the time, you can use:
select STR_TO_DATE('14/02/2017 23:38:12', '%d/%m/%Y %T');
Which produces:
2017-02-14 23:38:12
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html
use the above page to refer more Functions in MySQL
SELECT STR_TO_DATE(StringColumn, '%d-%b-%y')
FROM table
say for example use the below query to get output
SELECT STR_TO_DATE('23-feb-14', '%d-%b-%y') FROM table
For String format use the below link
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-format
The following illustrates the syntax of the STR_TO_DATE() function:
STR_TO_DATE(str,fmt);
The STR_TO_DATE() converts the str string into a date value based on the fmt format string. The STR_TO_DATE() function may return a DATE , TIME, or DATETIME value based on the input and format strings. If the input string is illegal, the STR_TO_DATE() function returns NULL.
The following statement converts a string into a DATE value.
SELECT STR_TO_DATE('21,5,2013','%d,%m,%Y');
Based on the format string ‘%d, %m, %Y’, the STR_TO_DATE() function scans the ‘21,5,2013’ input string.
First, it attempts to find a match for the %d format specifier, which
is a day of the month (01…31), in the input string. Because the
number 21 matches with the %d specifier, the function takes 21 as the
day value.
Second, because the comma (,) literal character in the format string
matches with the comma in the input string, the function continues to
check the second format specifier %m , which is a month (01…12), and
finds that the number 5 matches with the %m format specifier. It
takes the number 5 as the month value.
Third, after matching the second comma (,), the STR_TO_DATE()
function keeps finding a match for the third format specifier %Y ,
which is four-digit year e.g., 2012,2013, etc., and it takes the
number 2013 as the year value.
The STR_TO_DATE() function ignores extra characters at the end of the input string when it parses the input string based on the format string. See the following example:
SELECT STR_TO_DATE('21,5,2013 extra characters','%d,%m,%Y');
More Details : Reference
In mysql database,column name created.This "created " column is text datatype,I need to change this to datetime.Now this column have so many datas.Is it possible to convert it or?
Database look like
created
18-11-15 18:21:25
Expecting ouput is
created
2018-11-15 18:21:25
When am doing
ALTER TABLE invoices MODIFY created datetime
This query giving wrong data.its converting from 15-09-18 03:03:43 to 2015-09-18 03:03:43
If the original data is not in MySQL Datetime format (YYYY-MM-DD HH:MM:SS), you cannot just change the column datatype from Varchar/Text to Date/Datetime. Otherwise, there will be an irreparable Data loss.
This will be a multi-step process. You will first need to convert the date string to MySQL date format (YYYY-MM-DD HH:MM:SS). We can use STR_TO_DATE() function for this.
Your sample date string (18-11-15 18:21:25) is basically in %y-%m-%d %T format. Following format specifiers can be used:
%d Day of the month as a numeric value (01 to 31)
%m Month name as a numeric value (00 to 12)
%y Year as a numeric, 2-digit value
%T Time in 24 hour format (hh:mm:ss)
The query to update the date would look as follows:
UPDATE invoices
SET created = STR_TO_DATE(created, '%y-%m-%d %T');
Now, you can use Alter Table to change the data type from Text type to Datetime.
ALTER TABLE invoices
MODIFY COLUMN created datetime;
The best thing to do here is to not store your dates as text. Assuming you have already done this, we can cope by calling STR_TO_DATE to generate a bona fide date:
SELECT
STR_TO_DATE(created, '%y-%m-%d %h:%i:%s') AS created_out
FROM yourTable;
Since the output you expect is standard date output, we can stop here and avoid also calling DATE_FORMAT to generate a different output.
you want to convert output or database records ? for second you can use sql query :
UPDATE 'table_name' SET 'created' = CONCAT('20', 'created')
You will need first to interchange the day with the year in the created column, as follows:
UPDATE invoices
SET created = CONCAT(SUBSTR(created, 7, 2), '-', SUBSTR(created, 4, 2), '-', SUBSTR(created, 1, 2));
Then, you convert the column to DATETIME, as follows:
ALTER TABLE invoices MODIFY created DATETIME;
Hope this helps.
I have a table with type DATE. How do i convert the below date to be able to insert it into the table.
15-JUL-12 3:09pm
I tried the following, but it keeps saying Incorrect date time values.
STR_TO_DATE('15-JUL-12 3:09pm', '%d-%m-%y %h:%i%p')
STR_TO_DATE() is the correct function to use, but there is a problem with the format string.
Use %b for abbreviated month name (or generally %M for month names) in your format string. E.g.:
STR_TO_DATE('15-JUL-12 3:09pm', '%d-%b-%y %h:%i%p')
See:
http://dev.mysql.com/doc/refman/5.6/en/date-and-time-functions.html#function_date-format
for documentation of format symbols
I have a string column which acts as a date and I want to select it as a DATE.
Is it possible?
My sample data format would be:
month/day/year -> 12/31/2011
As was told at MySQL Using a string column with date text as a date field, you can do
SELECT STR_TO_DATE(yourdatefield, '%m/%d/%Y')
FROM yourtable
You can also handle these date strings in WHERE clauses. For example
SELECT whatever
FROM yourtable
WHERE STR_TO_DATE(yourdatefield, '%m/%d/%Y') > CURDATE() - INTERVAL 7 DAY
You can handle all kinds of date/time layouts this way. Please refer to the format specifiers for the DATE_FORMAT() function to see what you can put into the second parameter of STR_TO_DATE().
STR_TO_DATE('12/31/2011', '%m/%d/%Y')
Here's another two examples.
To output the day, month, and year, you can use:
select STR_TO_DATE('14/02/2015', '%d/%m/%Y');
Which produces:
2015-02-14
To also output the time, you can use:
select STR_TO_DATE('14/02/2017 23:38:12', '%d/%m/%Y %T');
Which produces:
2017-02-14 23:38:12
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html
use the above page to refer more Functions in MySQL
SELECT STR_TO_DATE(StringColumn, '%d-%b-%y')
FROM table
say for example use the below query to get output
SELECT STR_TO_DATE('23-feb-14', '%d-%b-%y') FROM table
For String format use the below link
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-format
The following illustrates the syntax of the STR_TO_DATE() function:
STR_TO_DATE(str,fmt);
The STR_TO_DATE() converts the str string into a date value based on the fmt format string. The STR_TO_DATE() function may return a DATE , TIME, or DATETIME value based on the input and format strings. If the input string is illegal, the STR_TO_DATE() function returns NULL.
The following statement converts a string into a DATE value.
SELECT STR_TO_DATE('21,5,2013','%d,%m,%Y');
Based on the format string ‘%d, %m, %Y’, the STR_TO_DATE() function scans the ‘21,5,2013’ input string.
First, it attempts to find a match for the %d format specifier, which
is a day of the month (01…31), in the input string. Because the
number 21 matches with the %d specifier, the function takes 21 as the
day value.
Second, because the comma (,) literal character in the format string
matches with the comma in the input string, the function continues to
check the second format specifier %m , which is a month (01…12), and
finds that the number 5 matches with the %m format specifier. It
takes the number 5 as the month value.
Third, after matching the second comma (,), the STR_TO_DATE()
function keeps finding a match for the third format specifier %Y ,
which is four-digit year e.g., 2012,2013, etc., and it takes the
number 2013 as the year value.
The STR_TO_DATE() function ignores extra characters at the end of the input string when it parses the input string based on the format string. See the following example:
SELECT STR_TO_DATE('21,5,2013 extra characters','%d,%m,%Y');
More Details : Reference