I want insert the current date and time into my table....
I used this query
insert into tbl_reminder values("Description",current_timestamp);
but it insert the wrong time...
actually the timestamp in my emulator is 2010-09-16 18:40:06
but the inserted timestamp value is 2010-09-16 13:10:06
what i do to insert the exact time...
Insert it enclosed within Quotes, the date will be stored as a string.
sqlite doesn't has a Date datatype.
Now, the following is just incase you are planning to use the Date column for Comparisions...
Speaking from experience, i would advice you store it as Long Integer, as a Unix Timestamp, it lets you do Comparison between dates, which would otherwise be very difficult.
You'll obviously have to convert it to-and-fro but in the long run it's a better stratergy.
Related
I am storing date format in sqlite table, I want sort by date from table.
Every record in my SQLite database contains a column which contains a date stored as a string in the format 'yyyy-MM-dd HH:mm:ss'.
I am sharing my table structure. I am using this query to sort by datetime it not sorting by time but sort by date is working fine.
select *
from messages_table
where id = '444'
order by datetime(date_time) asc
I am storing datetime as string in my below table
and I am getting the below wrong sorting by time output please see my date_time column in the picture, anyone guide me.
I have a similar problem with the TIME datatype.
If I enter time values correctly, such as 8:00 or 13:00, they are sorted as strings in an ORDER BY clause, in effect as "800" and "1300", where the string "1300" is sorted before "800" in ascending order.
One solution is to pad all times with a leading 0, so we get "0800" and "1300" which will be sorted time wise correctly.
I have an SQLite database within my Android application, which stores dates as integers. These integers are derived from a call to Java.util.Date.getTime();. I am trying to run a raw query of my database to get a Cursor to pass to a CursorAdapter and display in a ListView, but the date is stored as an integer as returned by getTime().
To keep my program simple, I would like to avoid using a SimpleArrayAdapter, and stick with the CursorAdapter.
Is it somehow possible to format the integer within the date colum as mm-dd-yyyy so that the column of the table, that the cursor is pointing to, contains properly formatted values rather than the integer that was returned by Java.util.Date.getTime(); when I added the item to the database?
SELECT strftime("%m-%d-%Y", date_col, 'unixepoch') AS date_col
Your code will work if it expects a result set column in that format called date_col.
EDIT: One thing you need to watch out for is that getTime uses milliseconds since 1970, while standard UNIX time (including SQLite) uses seconds.
The Java.util.Date.getTime(); method is returning an integer that represents the "unix time".
The simplest way to read this number as a date is by storing it as-is, and reading it using the following Sqlite query:
SELECT strftime('%m-%d-%Y', 1092941466, 'unixepoch');
which returns:
08-19-2004
If you need another format, you can use the strftime function to format is as you like, or any of the other date formats and functions available.
You'll have to, as Matthew Flaschen points out in a commend below, divide the date by 1000 before you are able to use them in this way. "Real" unix times are measured in seconds since the epoch, and Java.util.Date.getTime(); returns milliseconds since epoch.
SQLite uses static rigid typing. With static typing, the datatype of a value is determined by its container - the particular column in which the value is stored.
Any value stored in the SQLite database has one of the following storage class:
NULL
INTEGER
REAL
TEXT
BLOB
so I am not sure what you meant by but the date is stored as a long, unhelpful integer.
For more details please refer to Datatypes In SQLite Version 3. For further information on storing date/time in SQLite please refer to SQL As Understood By SQLite.
I hope this helps.
I have records in my SQLite database and I'd like to check if a certain record is older than a certain amount of hours (or minutes or seconds).
I couldn't find a function to calculate "age()" in SQLite (like they have in Postgres). Does it exist?
If not, I was already trying to extract the epoch of the record (works fine) and was thinking to compare that with the epoch of the current time. But I can't find a function that will simply return me the epoch of the current timestamp. Can anybody help?
(Note: I did check SimpleDateFormat, currenttimemillis() etc, but didn't seem to do what I want or I'm missing something)
You are able to retrieve difference between current time and "last_updated" only by SQL language:
SELECT strftime('%s','now','localtime')-strftime('%s','2011-08-18 22:49:00') as date;
This SQL statement will return me difference between current time and 2011-08-18 22:49:00. Instead of 2011-08-18 22:49:00 you can pass last_updated column name and it should return you difference between them.
You can read more here
I have an SQLite database within my Android application, which stores dates as integers. These integers are derived from a call to Java.util.Date.getTime();. I am trying to run a raw query of my database to get a Cursor to pass to a CursorAdapter and display in a ListView, but the date is stored as an integer as returned by getTime().
To keep my program simple, I would like to avoid using a SimpleArrayAdapter, and stick with the CursorAdapter.
Is it somehow possible to format the integer within the date colum as mm-dd-yyyy so that the column of the table, that the cursor is pointing to, contains properly formatted values rather than the integer that was returned by Java.util.Date.getTime(); when I added the item to the database?
SELECT strftime("%m-%d-%Y", date_col, 'unixepoch') AS date_col
Your code will work if it expects a result set column in that format called date_col.
EDIT: One thing you need to watch out for is that getTime uses milliseconds since 1970, while standard UNIX time (including SQLite) uses seconds.
The Java.util.Date.getTime(); method is returning an integer that represents the "unix time".
The simplest way to read this number as a date is by storing it as-is, and reading it using the following Sqlite query:
SELECT strftime('%m-%d-%Y', 1092941466, 'unixepoch');
which returns:
08-19-2004
If you need another format, you can use the strftime function to format is as you like, or any of the other date formats and functions available.
You'll have to, as Matthew Flaschen points out in a commend below, divide the date by 1000 before you are able to use them in this way. "Real" unix times are measured in seconds since the epoch, and Java.util.Date.getTime(); returns milliseconds since epoch.
SQLite uses static rigid typing. With static typing, the datatype of a value is determined by its container - the particular column in which the value is stored.
Any value stored in the SQLite database has one of the following storage class:
NULL
INTEGER
REAL
TEXT
BLOB
so I am not sure what you meant by but the date is stored as a long, unhelpful integer.
For more details please refer to Datatypes In SQLite Version 3. For further information on storing date/time in SQLite please refer to SQL As Understood By SQLite.
I hope this helps.
I want to store a timevalue in an SQLite database in Android. My time value is in EditText, and when I click the save button I would like the time value to be stored in the database. And also I want to review the already-stored value in the database.
SQLite doesn't have a specific datatype for storing times, and leaves it up to you whether you want to store them as text, integers, or floating-point values, so you can establish whatever convention works best for you.
For your application where you want the time to be editable by the user I'd suggest looking into the DatePicker and TimePicker widgets, so that you don't have to worry about parsing and formatting the time as text, and then the Java Calendar class for converting the data from those into a simple value that you can put in the database (I'd suggest using the getTimeInMillis() method to convert it into a integer).
Sqlite + timestamp = Date and time functions
Sqlite + timestamp + android = Timestamp Class
Other options
create a column for each piece of info you wish to store (day, hour, min, second, etc)
convert time into long and store that instead. Use java.sql.Time