I have the following mysqli query in my search.php file with ajax.
SELECT demand2.* FROM demand2
WHERE ddate >= '$dto' AND ddate >= '$dfrom' AND !(mach='--' OR mach='-' OR mach='' OR mach='----' OR mach='-----' OR mach='---');
field ddate is datatype of varchar2
as I entered Date From 01-01-2019 and Date To 30-01-2019, it shows the result with previous date like 29-12-2019.
So I can't find the solution to get result within specified range. Please Help.
Just as rypskar said, your type of field should be date.
If you don't want to change the datatype of the fiels, then you have to convert the string to date with STR_TO_DATE(ddate, '%d-%m-%Y'). But this is not recommended, as it will cause performance degradation on larger tables.
So your query would be like that (not tested!):
SELECT demand2.* FROM demand2
WHERE STR_TO_DATE(ddate, '%d-%m-%Y') >= STR_TO_DATE('$dto', '%d-%m-%Y') AND STR_TO_DATE(ddate, '%d-%m-%Y') >= STR_TO_DATE('$dfrom', '%d-%m-%Y') AND !(mach='--' OR mach='-' OR mach='' OR mach='----' OR mach='-----' OR mach='---');
If you want to keep the varchar type of field and not make any runtime conversions, then you have to change the format to Y-m-d, so the comparison with character set will work the same as a date comparison.
Right now, you are getting the result of 29-12-2019 because 29 is between 1 and 30.
Related
I have a syntax, but it doesn't work.
Here is my query:
SELECT *
FROM aqua.reading
WHERE
CAST(reading.pres_date AS VARCHAR)
BETWEEN LIKE '2022-10-18%' AND LIKE '2022-10-18%'
it says:
ERROR: type "like" does not exist
LINE 1: ... WHERE CAST(reading.pres_date AS VARCHAR) BETWEEN LIKE '2022...
^
SQL state: 42704
Character: 77
I am trying to get all the data with timestamp and timezone and implement a date range
Don't compare dates (or timestamps) as strings. Compare them to proper date (or timestamp) values. Given the fact that you use the same "date" but with a wildcard at the end, I am assuming(!) that pres_date is in fact a timestamp column and you want to find all rows with a given date regardless of the time value of the timestamp.
The best approach is to use a range query with >= ("greater than or equal) on the lower value and < (strictly lower than) on the next day:
SELECT *
FROM aqua.reading
WHERE reading.pres_date >= DATE '2022-10-18'
AND reading.pres_date < DATE '2022-10-19'
Alternatively you can cast the timestamp to a date and use the = operator if you really want to pick just one day:
SELECT *
FROM aqua.reading
WHERE cast(reading.pres_date as DATE) = DATE '2022-10-18'
However that will not make use of a potential index on pres_date so is likely to be slower than the range query from the first solution
I'm trying to select records from a DB2 Iseries system where the date field is greater than the first of this year.
However, the date fields I'm selecting from are actually PACKED fields, not true dates.
I'm trying to convert them to YYYY-MM-DD format and get everything greater than '2018-01-01' but no matter what I try it says it's invalid.
Currently trying this:
SELECT *
FROM table1
WHERE val = 145
AND to_date(char(dateShp), 'YYYY-MM-DD') >= '2018-01-01';
it says expression not valid using format string specified.
Any ideas?
char(dateshp) is going to return a string like '20180319'
So your format string should not include the dashes.. 'YYYYMMDD'
example:
select to_date(char(20180101), 'YYYYMMDD')
from sysibm.sysdummy1;
So your code should be
SELECT *
FROM table1
WHERE val = 145
AND to_date(char(dateShp), 'YYYYMMDD') >= '2018-01-01';
Charles gave you a solution that converts the Packed date to a date field, and if you are comparing to another date field, this is a good solution. But if you are comparing to a constant value or another numeric field, you could just use something like this:
select *
from table1
where val = 145
and dateShp >= 20180101;
I'm trying to convert value for DIM_DT_ID to MMddYY. I'm successful in doinf that. However, query fails because ultimately I'm comparing a character value to date here. Is there a way by which I can get value for DIM_DT_ID in MMddyy format and its data type still remains DATE ?
Here DIM_DT_ID
SELECT DIM_DT_ID
DIM_DT_ID >= FORMATDATE('MMddyy',ADDDAY(TO_date('yyyy-MM-dd','2016-12-21'), -25)); from abc;
Regards,
Ajay
In Denodo, to convert a string to a date field, use "to_date()" (which returns a date).
Then, don't convert back to a string, leave that field as a date (so don't use "Formatdate()", which returns a string).
So:
SELECT *
FROM MyTable
WHERE now() >= to_date('yyyy-MM-dd',myStringFieldThatLooksLikeADate)
In my example, "now()" is a date, and so is the output of the to_date function... so you can do a comparison.
If you try to convert the date back to a string using formatdate, it won't work:
#This doesn't work:
SELECT *
FROM MyTable
WHERE now() >= formatdate('MMddyy',to_date('yyyy-MM-dd',myStringFieldThatLooksLikeADate))
It doesn't work because we are comparing a date ("now()") to a string.
I have column of type date time and values are getting stored in format 10-29-2011 08:25.
I would like to find out the rows only which are less then current date-time. What will be the condition for date comparison for current date and this date-time column field?
Thanks.
you could use the datetime function
SELECT * FROM mytable
WHERE mydate > datetime('now')
you can even make date operations
SELECT * FROM mytable
WHERE mydate > datetime('now','-15 days')
Help me Stackoverflow, I'm close to going all "HULK SMASH" on my keyboard over this issue. I have researched carefully but I'm obviously not getting something right.
I am working with a Julian dates referenced from a proprietary tool (Platinum SQL?), though I'm working in SQL 2005. I can convert their "special" version of Julian into datetime when I run a select statement. Unfortunately it will not insert into a datetime column, I get the following error when I try:
The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value.
So I can't setup datetime criteria for running a report off of the Stored Procedure.
Original Value: 733416
Equivalent Calendar Value: 01-09-2009
Below is my code... I'm so close but I can't quite see what's wrong, I need my convert statement to actually convert the Julian value (733416) into a compatible TSQL DATETIME value.
SELECT
org_id,
CASE WHEN date_applied = 0 THEN '00-00-00'
ELSE convert(char(50),dateadd(day,date_applied-729960,convert(datetime, '07-25-99')),101)
END AS date_applied,
CASE WHEN date_posted = 0 THEN '00-00-00'
ELSE convert(char(50),dateadd(day,date_posted-729960,convert(datetime, '07-25-99')),101)
END AS date_posted
from general_vw
SELECT
org_id,
CASE WHEN date_applied = 0 OR date_applied < 639906 THEN convert(datetime, '1753-01-01')
ELSE dateadd(day,date_applied-729960,convert(datetime, '07-25-99'))
END AS date_applied,
CASE WHEN date_posted = 0 OR date_applied < 639906 THEN convert(datetime, '1753-01-01')
ELSE dateadd(day,date_posted-729960,convert(datetime, '07-25-99'))
END AS date_posted
from general_vw
You're casting to char but want a datetime so that's one easy fix.
You were also using '00-00-00' as your minimum date, but the minimum TSQL date is '1753-01-01'. Alternatively you could use something like ('1900-01-01') but that would need a change to the "less than" date_applied comparer.
I've added a "less than" date_applied comparer too. I calculated this as "SELECT 729960 + datediff(day,convert(datetime, '07-25-99'), convert(datetime,'1753-01-01'))". Any number less than this would cause a date underflow.