Develop Reference

Is there a way to compare the size of format date in Android room query?

I'll show you the code first
#Query("SELECT * FROM plan WHERE (DATETIME(startDate, '%Y-%m-%d') <= :temp OR DATETIME(endDate, '%Y-%m-%d') >= :temp) OR specificDate = :temp")
fun getPlanByDate(temp: String): List<PlannerEntity>
Inside the table named plan, there are startDate, endDate, and specificDate columns. Based on the date called temp, I want to get only data belonging to temp. The format of temp is "yyyy-MM-dd". The startDate and endDate are stored in "yyyy-MM-dd HH:mm" format, so you can see my efforts to change it to "yyyy-MM-dd" format. How can I change the format yyyy-MM-dd HH:mm to yyyy-MM-dd format?

How can I change the format yyyy-MM-dd HH:mm to yyyy-MM-dd format?
Use date(the_column) or strftime('%Y-%m-%d',the_column)
However, I believe that your logic is incorrect as it will only be if the endDate is less than the startDate that a row will be excluded.
You possibly want AND rather than OR as per :-
.... WHERE (date(startDate) <= :temp AND date(endDate) >= :temp) OR date(specificDate) = :temp
or alternately the simpler :-
.... WHERE :temp BETWEEN date(startDate) AND date(endDate) OR date(specificDate) = :temp
You may wish to refer to SQLite Date And Time Functions from which covers the date, datetime, time, julianday and strftime functions (i.e. date manipulation).

Datetime comparison in SQLite with unique format

I have a requirement, wherein column having date time information must be compared against present date & time. If earlier then this particular record must be deleted.
I have progressed with below implementation, but not getting any error & expected behavior is not met.
SimpleDateFormat dateFormat = new SimpleDateFormat("dd MMM yyyy HH:mm", Locale.getDefault());
Calendar nowCalendar = Calendar.getInstance();
String strNowTime = dateFormat.format(nowCalendar.getTime());
// Delete the records at Manager_Dashboard SQLiteDB
String whereClause = "DATETIME(End_Time) < DATETIME(?)";
String whereArgs[] = {strNowTime};
dbOfflineRange.delete("Offline_Range",whereClause,whereArgs);
As you could notice, if I have a record with End_Time in text within SQLite table (as 30 Nov 2018 21:35), then this should be compared against current datetime (as 30 Nov 2018 23:35)
As End_Time being earlier than Now, I am expecting deletion. But its not happening.

The Date and Time SQL functions require the date to be in a recognised format.
Time Strings A time string can be in any of the following formats:
YYYY-MM-DD
YYYY-MM-DD HH:MM
YYYY-MM-DD HH:MM:SS
YYYY-MM-DD HH:MM:SS.SSS
YYYY-MM-DDTHH:MM
YYYY-MM-DDTHH:MM:SS
YYYY-MM-DDTHH:MM:SS.SSS
HH:MM
HH:MM:SS
HH:MM:SS.SSS
now
DDDDDDDDDD
SQL As Understood By SQLite - Date And Time Functions
Your best(simplest) option would be to store them as YYYY-MM-DD HH:MM (i.e. change the SimpleDateFormat accordingly).
Note you would not even need the datetime function as direct comparison of the values would result in the desired outcome.
Storing the unix timestamp value would be the more efficient storage/processing time wise.
You can then use the strftime function to return the date in the format you wish.
Otherwise you can convert the store value to a recognised format using SQL functions such as substr and then do the comparison.
SQL As Understood By SQLite - Core Functions
here's an example of how you could handle data stored in DD MMM YYYY HH:MM format
assuming that the value to compare against is provided in YYYYMMDDHH:MM format :-
DROP TABLE IF EXISTS Offline_Range;
CREATE TABLE IF NOT EXISTS Offline_Range (end_time);
-- Add some test data dd MMM yyyy HH:mm
INSERT INTO Offline_Range VALUES
('21 May 2018 10:30'),
('21 Jun 2018 10:30'),
('21 Jul 2018 10:30'),
('21 Aug 2018 10:30')
;
SELECT * FROM Offline_Range
WHERE
substr(end_time,8,4)||
CASE
WHEN instr(end_time,'Jan') THEN '01'
WHEN instr(end_time,'Feb') THEN '02'
WHEN instr(end_time,'Mar') THEN '03'
WHEN instr(end_time,'Apr') THEN '04'
WHEN instr(end_time,'May') THEN '05'
WHEN instr(end_time,'Jun') THEN '06'
WHEN instr(end_time,'Jul') THEN '07'
WHEN instr(end_time,'Aug') THEN '08'
WHEN instr(end_time,'Sep') THEN '09'
WHEN instr(end_time,'Oct') THEN '10'
WHEN instr(end_time,'Nov') THEN '11'
WHEN instr(end_time,'Dec') THEN '12'
END
||
substr(end_time,1,2)||substr(14,5)
<
'2018062200:00' -- 22 Jun 2018 00:00 amended to suit i.e. the value input
This creates a table :-
The result from the query would be :-

Android SQLiteStatement: how to bind numeric (Date, BigDecimal)

Android SQLiteStatement: how to bind numeric (Date, BigDecimal)?
SQLiteStatement has
bindNull
bindLong
bindDouble
bindString
bindBlob
For java.util.Date and java.util.BigDecimal, they are mapped to Numeric as column type. But there is no bindNumeric(...) method. Which method for binding these types?

Date
Date could be bound as long or a String depending on the value. The former if it's an integer representation of the date, the latter if it's a more human readable date. It may be wise to use the formats supported by SQLite's Date/Time functions as per :-
Time Strings
A time string can be in any of the following formats:
YYYY-MM-DD
YYYY-MM-DD HH:MM
YYYY-MM-DD HH:MM:SS
YYYY-MM-DD HH:MM:SS.SSS
YYYY-MM-DDTHH:MM
YYYY-MM-DDTHH:MM:SS
YYYY-MM-DDTHH:MM:SS.SSS
HH:MM HH:MM:SS
HH:MM:SS.SSS
now
DDDDDDDDDD
Date And Time Functions
Big Decimal
You can downgrade to double and bind as a double (noting potential loss), bind as a string (note type affinity comes into play i.e. column affinity should be TEXT) or use two longs one for the scale and one for the un-scaled value.
You should refer to Datatypes In SQLite Version 3

Android sqlite time compare issue

I am comparing time in android sqlite database, here is my table structure in the screen shots. Actually I have two times, like 8:00 and 7:30 (basically these are employee shift timings) in the string and I have a column c_TIME in my database and I want all the records who lies in b/w my two time i.e.(8:00 and 7:30) from c_TIME.
I have used this query but it is not working, please anyone guide me what I am doing wrong
SELECT *
FROM ATTENDANCE
WHERE strftime('%H','08:00') > strftime('%H', c_TIME) AND
time('08:00') < strftime('%H', c_TIME) AND
STATE = 'IN'

The following should work:
SELECT *
FROM ATTENDANCE
WHERE strftime('%H:%M:%S', c_date) > '07:30:00' AND
strftime('%H:%M:%S', c_date) < '08:00:00' AND
STATE = 'IN'
Comments:
Instead of using the c_TIME field, you should use c_date. Actually, I don't see any value in keeping around a column which stores the time separately.
strftime returns a string based on some sort of datetime/timestamp input. The output from strftime('%H:%M:%S', c_date) should have the form HH:MM:SS, and this string can be compared lexicographically against 08:00:00 and 07:30:00. The comparison should still work, because for strings of the same length it should still sort numerically.

Try:
select * from ATTENDANCE where c_date between 'yyyy-mm-dd' and 'yyyy-mm-dd';
Instead of using c_TIME,use c_date field.
You can change the date format in the query accordingly to retrieve data between two specific times.
Sqlite supports following formats:
YYYY-MM-DD
YYYY-MM-DD HH:MM
YYYY-MM-DD HH:MM:SS
YYYY-MM-DD HH:MM:SS.SSS
YYYY-MM-DDTHH:MM
YYYY-MM-DDTHH:MM:SS
YYYY-MM-DDTHH:MM:SS.SSS
HH:MM
HH:MM:SS
HH:MM:SS.SSS
now
DDDDDDDDDD
See here

Compare Dates Stored as String using Datetime

I have stored dates' date as String in my database in the following format :
dateFormater = new SimpleDateFormat("dd MMM yyyy");
Now i need to access data between the two dates startWeekDate and endWeekDate both formatted as above. Currently , the where clause of my query is :
at_date BETWEEN Datetime( '"+startWeekDate+"') AND Datetime( '"+endWeekDate+"')
Where startWeekDate is '10 Aug 2014' and endWeekDate is '16 Aug 2014'. But I am getting the null result on my TextView. Can any one guide me how can i do this.

This is not one of the supported date formats.
Just use yyyy-MM-dd.