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.
Related
I'm new to the SQL world and im going crazy trying to figure out how to SELECT date from a datetime field in SQLITE.
Example: value <11/11/2005 14:56>, i just want to select <11/11/2005> for EVERY ROW.
I tried strftime(), date(), CAST() and other functions but the output its always NULL.
For example i tried querying SELECT strftime('%d/%m/%Y' , columnname) AS date FROM tablename;
OUTPUT: "NULL" in every row
Can someone help me understand what im doing wrong and how can i fix it? Thank you!!!
It always returns NULL because MM/DD/YYYY is not a valid sqlite date format. Treat the column as a string and use substr and instr to drop off the time portion. Something like (no guarantees, check the doc!)
SELECT substr(columname,0,instr(columnname,' '))
Re comment "how to order by the date in descending order"
This problem is a good argument (the best argument?) for storing the date in a sqlite date/time format. There is a strategy in this post for converting MM/DD/YYYY to YYYY-MM-DD (which sorts dates correctly).
If it's not too late, it would be advisable to change the date storage to a valid sqlite date format. strftime can be used to present the date as desired, and sorting will be accurate.
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)...
The following code, d has the current date. Depending on the current locale, it will return a date.
Dim d As Date = Date.Today
Note: I don't want to check whether the date is valid or not, but rather to know, whether it is in a 'dd-MM-yyyy', 'MM-dd-yyyy' or any other date format..
EDIT (29/06/2012 - Friday):
The reason I am asking this question is because I am sick of trying to deal with dates in ASP.NET. I build a project on my local PC, where dates are "dd/MM/yyyy" and as soon as I upload it to the production server (usually in US, hence MM/dd/yyyy) the code breaks.
So I usually deal with dates by converting them into yyyyMMdd format and also keep them in the database like that. That is the closest I get to an exception-free coding.
In this case, it makes sense that there is no way to get the format from a returned date string. Therefore, I will carry on with my approach.
Date.Today is a DateTime, not a string. Thus, it does not have an inherent format.
It will return a Date, which I believe is a VB alias for DateTime. (If it's not, just use DateTime explicitly to be idiomatically .NET rather than using the legacy VB types.)
A DateTime value itself doesn't have a format, any more than an int is in decimal or hex. It's only when you convert the value to a string that a format is applied, and then it depends on how you convert it to a string. You shouldn't use a string conversion until you really need to, and then you should control the format so that it works the way you want it to.
As far as possible, convert text data into its "natural" type as early as possible, and keep it in that type for as long as possible. For example, avoid converting to strings when passing values in SQL queries - instead, use parameterized SQL where you can specify the parameter value as a DateTime.
What you want to know is found in:
CultureInfo.CurrentCulture.DateTimeFormat.ShortDatePattern
This is the format string that will be used when you call
d.ToShortDateString()
You need to be TOLD; there's no other way. Take for example:
6/12/2012
It's valid in dd/mm/yyyy or mm/dd/yyyy format
Which one do you pick if you don't know the locale/format beforehand?
Date values don't have an intrinsic format. In other words, you can format the date to any string representation you need but the opposite conversion from a string back to a Date value requires that you know in which format you are receiving this date string.
I have an ASP.NET program that is writing date to an SQLExpress Database date field in DD/MM/YYYY.
When I look at the data in SQL Express it is stored as mm/dd/yyyy.
How can I configure it to store in DD/MM/YYYY format?
This is not possible, as the date is internally stored as a number, the DD/MM/YYYY or MM/DD/YYYY format is only the display format of the data. You can, however, change the way the data are converted to a string by SQL functions...
You are seeing the a rendered, localised version of an internal date representation (numbers of days since 01 Jan 1900 basically).
Don't worry about it. You'll get date back to your client (in an internal date representation) and this can be formatted how you like there.
Store the data normally. When you retrieve the data, do something like this on the code:
dateField.ToString("dd/MM/yyyy")
And your result will be: 11/04/2011
Maybe you can select that like this:
select CONVERT(varchar(12) , getdate(), 103 )
I am new to development and want to know the professional way to deal with dates in SQL Server. In my applications mainly we deal with the DATE datatype and no concern with time part. Also maintaining the format dd/mm/yyyy
So for example if I have the table with the following structure.
EmployeeTable
---------------
emp_id int
emp_name varchar(50)
join_date date
and if I want to query "join_date" in between start date and end date and pass the dd/mm/yyyy as stored procedure criteria and want to query.
What is the professional way to handle dates? I always convert date in varchar and then do the comparison which I guess is the unprofessional way of doing it. So please guide how to do it in procedure with example I would appreciate.
SQL handles dates just fine, so you do not need to convert the dates.
If you pass in the parameters as date types, then you will have no problem:
CREATE PROCEDURE myProc
#start date,
#end date
AS
SELECT emp_id, emp_name, join_date
FROM EmployeeTable
WHERE join_date BETWEEN start AND end;
Unless you want to format a date in your output in a specific way, there's no reason to convert the date to a varchar. You're using the date datatype, so let SQL do the comparisons for you.
If you want to compare dates in a date range, you can use this:
WHERE join_date BETWEEN '2010-01-01' AND '2010-12-31'
Keep dates as dates. Do not convert it to strings. That is unnecessary.
When you send dates in to SQL Server from your code, do it with parameters, then you don't have to worry about the right format in your strings.
SQL Server Date data types:
Date: 0001-01-01 through 9999-12-31
SmallDateTime: 1900-01-01 through
2079-06-06 (Accuracy 1 minute)
DateTime: January 1, 1753, through
December 31, 9999 (Accuracy
millisecond)
DateTime2: 0001-01-01 through
9999-12-31 (Accuracy 100 nanoseconds)
It's a minor point but worth noting that all queries presented to SQL Server are in TEXT. At some stage, based on some language and translation setting in the data access layer (OLEDB, Native, ADO) it gets turned into a textual form, so dates are always presented as "text".
The best format to use is always YYYYMMDD for SQL Server. Even YYYY-MM-DD can be wrong, for obscure dateformat settings. See this example.
set dateformat dmy -- more than common for non-US locations
select CONVERT(varchar, convert(datetime, '2010-12-31'), 112)
It fails.
Msg 242, Level 16, State 3, Line 3
The conversion of a varchar data type to a datetime data type resulted in an out-of-range value.
That covers the format to use when you have to construct the date embedded in the SQL statement. When possible however, please parameterize queries for benefits like
prevention of SQL injection
letting the db connectivity layer ensure the right formats when generating the TSQL
query plan re-use on the SQL Server
point 3 = better performing queries and more efficient SQL Server