I have Sqlite database with table with date column, This column content a date values like Fri Dec 01 18:54:58 GMT+02:00 2017 and i want to convert this values to Unix timestamp, I try to slove this issue using strftime function i get null value.
Any idea how to solve this issue with Sqlite without a programmer language?
The command has been used is update Table set createDate=strftime('%s',createDate)*1000 where id=1
Sqlite Documentation
Related
In Sqlite I want to extract the date and time portions of a DateTime field separately in a view and return them also as a datetime, not strings. I've tried Cast, Date(), datetime(), but they all return strings.
I've read the SQLite documentation and understand how there is not an actual Date data type. Yet a Table field defined as DateTime is able to be parsed as a Date by an Excel query, but calculations on that field are not. I'm trying to do all data prep in the database view.
My data has the following field taken directly from the table definition:
LastModifiedDate datetime
I want the date (without time) to have the same DateTime data type as LastModifiedDate, not Text, because I use this view in many spreadsheets. I can apply Excel Date functions and formatting to LastModifiedDate field directly as returned from the ODBC query to Excel, and want to do the same to the Date-only part. I don't want to have to put a string-to-date conversion in every spreadsheet when I know it can get the date natively from Sqlite in LastModifiedDate.
SELECT LastModifiedDate,
date(LastModifiedDate) as Datepart,
cast(LastModifiedDate as numeric) as Date2
FROM Transactions
LastModifiedDate Datepart Date2
2019-07-28 18:22:38.9165394 2019-07-28 2019
LastModifiedDate in the above query is interpreted in Excel as a date to which date formats and date functions can be applied with no further processing required. Datepart above is returned as Text to Excel, and I can't apply date functions and formats without further pre-processing in Excel. I would like Datepart to be interpreted a date in Excel just as LastModifiedDate is.
I'm looking at the ch-werner.de sqliteodbc-0.9998. It will return an ODBC TIMESTAMP type only if the column decltype starts with timestamp or datetime. It returns ODBC TIME only for decltypes starting with time and ODBC DATE only for decltypes starting with date.
sqlite3 provides this decltype only for result table columns that are direct database column references. So if your SELECT statement has some expression that is more than a plain column reference, the decltype is lost. sqlite3 works like this at least up to version 3.39.0. It is documented.
The CAST expression converts the value of given expression to a storage classes by the determined affinity of the given declared type, but does not assign decltype to the result.
If you want to see the decltypes for query columns, you can use the sqlite3 cli and give it command .stats 2. Then it'll output the column declared types for each statement it executes.
If the decltype is found, the sqliteodbc-0.9998 will always parse string values into ODBC types. If DSN Option JDConv is enabled, it'll also parse floating point julianday values (whether provided as float or a string of a float) into ODBC types and when writing it'll write floating point into database.
If you can afford to change the schema, you can add a generated virtual column. This is cheap in storage, because data is not affected, but it costs when you query the column. This column can calculate other column into the values and decltypes you need for ODBC.
ALTER TABLE data ADD COLUMN
Datepart date AS (date(LastModifiedDate))
Then to get the Datepart, you simply query the column.
SELECT Datepart FROM data
I am using SQLite.
In my database, I have a integer column value like 20050819. I would like to convert this as date column as like 2005-08-19.
I can achieve my requirement when using the function CONVERT(columnName, DATETIME) in MySQL server. But I need the same result in SQLite.
Is this possible in SQLite query?
You basically have to break apart the date:
select printf('%4d-%02.2d-%02.2d',
columnname/10000, columnname%10000/100, columnname%100)
from tablename;
P.S.
If you have the choice, you will be far better off storing the date in ISO standard format ('YYYY-MM-DD') in the database in the first place.
I have a vendor oracle DB storing values to a column creation_timestamp as timestamp(6) when i create an extract of that table and load it to HDFS and create hive schema with that column defined as timestamp it does not populate the field. However if I use string it is all there. I have other MSSQL datetime data that successfully stored as timestamp in hive so I am just a little unsure why the oracle timestamp data is not populating.
The oracle timestmap looks like this: 07-JAN-15 05.55.20.732754000 PM
I have a feeling hive does not like the month as letters as the documentation states:Strings: JDBC compliant java.sql.Timestamp format "YYYY-MM-DD HH:MM:SS.fffffffff" (9 decimal place precision)
How can I convert the oracle timestamp(6):07-JAN-15 05.55.20.732754000 PM to the java.sql.Timestamp format shown above?
I was able to alter my session and then export the table, hive has now accepted it as a timestamp
ALTER SESSION SET NLS_TIMESTAMP_FORMAT = 'YYYY-MM-DD HH24:MI:SS.FF';
07-JAN-15 05.55.20.732754000 PM is now: 2015-01-07 17:55:20.732754000
Use to_date in hive.
Example :
select TO_DATE(from_unixtime(UNIX_TIMESTAMP('7-MAR-13', 'd-MMMM-yy'))) from table_name
Refer : date functions
i use oracle forms 11g. And i pass To_Date(sysdate,'dd-mm-yyyy') that is inserted to the data base and data type of the column is date. but it is inserted as 22-10-0015 instead of 22-10-2015 can you help me?
i use procedure to insert data s and oracle from button click.i need to insert dd-mm-yyyy format to the data base how to do this?
sysdate is already a date, so it doesn't make sense to call to_date() for it. You are implicitly converting it to a string, and then explicitly back to a date. The implicit step is using your Forms session's NLS_DATE_FORMAT, which is presumably DD-MM-YY from the symptoms, so you're really doing:
to_date(to_char(sysdate,'dd-mm-yy'),'dd-mm-yyyy')
The implicit string version would show the year as 15 if you ran that on its own; and the explicit conversion correctly sees that as 0015 rather than assuming 2015.
You should just pass sysdate directly; but if you're trying to strip out the time so it shows as midnight, you can use the trunc() function:
trunc(sysdate)
SYSDATE is already a DATE. You don't need to use TO_DATE to convert it into a DATE.
What it's happening is that you're converting SYSDATE into a string and you're using the YYYY mask which will translate any year over 2000 into the 00's (that's why 2015 is being converted to the year 15). If you use the RRRR mask you will get the expected result:
TO_DATE(SYSDATE,'dd-mm-rrrr')
However, this is not a good idea as it's unnecesary and could fail if the NLS_DATE_FORMAT model used for the implicit conversion to string doesn't match.
I am working on a SQLite Database which contains a column which stores value in format yyyy-MM-dd HH:mm:ss. Now I need to create a filter to select rows with filter as this datetime column.
Query:
Select * from tbl_locations where datetime >= '2013-09-11 00:00:00' and datetime <='2013-09-13 00:00:00'
Above query is returning null set despite containing values in this slot(which I verified using select statement without filter.)
Any suggestion how can i get the required data set?
Perhaps this excerpt from the SQLite documentation will help you:
1.2 Date and Time Datatype
SQLite does not have a storage class set aside for storing dates and/or times. Instead, the built-in Date And Time Functions of SQLite are capable of storing dates and times as TEXT, REAL, or INTEGER values:
TEXT as ISO8601 strings ("YYYY-MM-DD HH:MM:SS.SSS").
REAL as Julian day numbers, the number of days since noon in Greenwich on November 24, 4714 B.C. according to the proleptic Gregorian calendar.
INTEGER as Unix Time, the number of seconds since 1970-01-01 00:00:00 UTC.
Applications can chose to store dates and times in any of these formats and freely convert between formats using the built-in date and time functions.
The date and time functions that you can use in your SQL to build your query are documented at http://www.sqlite.org/lang_datefunc.html
Ok, I tested this out in MySQL but hopefully it will work. I had a table that used timestamps, and changed the column to be of type text. Then I tried the following SQL query and got the same results that I normally would (besides trailing decimals)
SELECT timestamp(stock_quote_timestamp)
FROM stock.stock_quote
WHERE stock_quote_timestamp < timestamp('2013-10-07 11:05:30')##high_date
AND stock_quote_timestamp > timestamp('2013-10-03 14:09:03');##low_date;
So basically, just convert your text statements to timestamps so that they compare correctly. Oh, and you'll also need to state what else you're SELECTing, or you could do a compound select statement: SELECT *, timestamp(stock_quote_timestamp)...