I have a table that have multiple date format on big query table. The Date format is followed:
(please note, this is coming from staging table so the data type is defaulted as string type.
mm/dd/yyyy
yyyy-mm-dd
I'm trying to standardized date format to yyyy-mm-dd. Here is the query as followed:
select calendar_date,
FORMAT_DATE('%Y-%m-%d',safe_cast(calendar_date as date))
FROM `calendar_dates.table`
The result that came out as null
please let me know if there is another way to solve this.
Use below
SELECT
calendar_date,
COALESCE(SAFE.PARSE_DATE('%Y-%m-%d', calendar_date), SAFE.PARSE_DATE('%d/%m/%Y', calendar_date))
FROM `calendar_dates.table`
The below query, that uses safe.parse_date seems to work for me:
WITH stg AS (
SELECT "9/9/2001" AS input_date
UNION ALL
SELECT "2021-01-01" AS input_date)
SELECT
CASE
WHEN safe.parse_DATE("%Y-%m-%d", input_date) IS NULL THEN
safe.parse_DATE("%d/%m/%Y", input_date)
ELSE safe.parse_DATE("%Y-%m-%d",input_date)
END AS output_date
FROM
stg
The table
becomes:
The logic is that: BQ tests one format and if it cannot make any sense of it, it tests the other format.
If none of them work the result is NULL.
Related
I am trying to perform date conversion of a column from YYYY-MM-DD to YYYYMMDD and insert the final value into a big query partitioned table.
I am getting error as "invalid value" after conversion.
I tried the below,
CASE WHEN o_date is not null THEN PARSE_DATE("%Y%m%d",cast(a.o_date as string))
ELSE PARSE_DATE("%Y%m%d",'19000101')
END as o_date
or
CASE WHEN o_date is not null THEN cast(FORMAT_DATE("%Y%m%d",o_date) as DATE)
ELSE PARSE_DATE("%Y%m%d",'19000101')
END as o_date
Could you please help to achieve the same
Cheers!
Instead of using PARSE_DATE you can use FORMAT_DATE. According to the documentation it formats a date_expression according to a format string, as follows:
FORMAT_DATE(format_string, date_expr)
Notice that the format_string must be a STRING and it should be written between double quotes following these formatting elements dictionary and the date_expr must be a DATE.
I ran the query below to exemplify how it should be:
WITH
a AS (
SELECT
"2020-01-31" AS date )
SELECT
FORMAT_DATE("%Y%m%d", CAST(date AS DATE)) AS new_date
FROM
a
I hope it helps.
I would like to store dates in the format CCYYMMDD in Teradata, but I fail to do so. Find below what I tried so far:
query 1:
SEL CAST(CAST(CURRENT_DATE AS DATE FORMAT 'YYYYMMDD') AS VARCHAR(8))
-- Output: 20191230 ==> this works!
query 2:
SEL CAST(CAST(CURRENT_DATE AS DATE FORMAT 'CCYYMMDD') AS VARCHAR(8))
-- output: SELECT Failed. [3530] Invalid FORMAT string 'CCYYMMDD'.
It seems that the CCYYMMDD is not available in Teradata right away. Is there a workaround?
Tool used: Teradata SQL assistant
Internally, dates are stored as integers in Teradata. So when you say you want to store them in a different format, I don't think you can do that. But you can choose how to display / return the values.
I'm sure there's a cleaner way to get the format you want, but here's one way:
WITH cte (mydate) AS (
SELECT CAST(CAST(CURRENT_DATE AS DATE FORMAT 'YYYYMMDD') AS CHAR(8)) AS mydate
)
SELECT
CAST(
(CAST(SUBSTRING(mydate FROM 1 FOR 2) AS INTEGER) + 1) -- generate "century" value
AS CHAR(2) -- cast value as string
) || SUBSTRING(mydate FROM 3) AS new_date -- add remaining portion of date string
FROM cte
SQL Fiddle - Postgres
You'd have to add some extra logic to handle years before 1000 and after 9999. I don't have a TD system to test, but give it a try and let me know.
I have a date column & I am simply trying to know the earliest date. I use the command:
select Min(Install_date) From PocketGemsSchema.pocketgemstable2;
This returns 1-Dec-17
But the minimum date from my sample data is actually 1-Nov-17.
Can anyone help please?
Try this:
If your Install_date contain datatype varchar than
SELECT MIN(CAST(Install_date AS DATE))
FROM PocketGemsSchema.pocketgemstable2
SELECT FORMAT(MIN(CAST(Install_dateAS DATE)), 'dd-MMM-yy ')
FROM PocketGemsSchema.pocketgemstable2
If your Install_date contain datatype date or datetime than your query will work
I think its the data type issue , you can try two approach
convert the field to datatime and your query should work
cast it on the run time like below
Mysql
SELECT Min(Str_to_date(Install_date, '%m/%d/%Y'))
FROM pocketgemsschema.pocketgemstable2;
SQL server
SELECT Min(Cast(Install_date as datetime))
FROM pocketgemsschema.pocketgemstable2;
I would change the column to a date or a datetime type and sort out any bugs that arise.
I have a table with one column dateX formatted as datetime and containing standard dates.
How can I select all records from this table where this dateX equals a certain date, e.g. May 9, 2014 ?
I tried the following, but this returns nothing even if I have several records with this date.
SELECT *
FROM dbo.LogRequests
WHERE (CONVERT(VARCHAR(10), dateX, 101) = '09/05/14')
Edit: In the database the above example looks as follows, using SQL 2012: 2014-05-09 00:00:00.000
The easiest way is to convert to a date:
SELECT *
FROM dbo.LogRequests
WHERE cast(dateX as date) = '2014-05-09';
Often, such expressions preclude the use of an index. However, according to various sources on the web, the above is sargable (meaning it will use an index), such as this and this.
I would be inclined to use the following, just out of habit:
SELECT *
FROM dbo.LogRequests
WHERE dateX >= '2014-05-09' and dateX < '2014-05-10';
For Perfect DateTime Match in SQL Server
SELECT ID FROM [Table Name] WHERE (DateLog between '2017-02-16 **00:00:00.000**' and '2017-12-16 **23:59:00.999**') ORDER BY DateLog DESC
SELECT *
FROM LogRequests
WHERE cast(dateX as date) between '2014-05-09' and '2014-05-10';
This will select all the data between the 2 dates
Im trying to find a set of results in a database based on dates. The dates are stored as varchars in the format dd/mm/yyyy hh:mm:ss.
What i would like to do is search for all dates within a range of specified dates.
For example i tried:
SELECT * FROM table_name
WHERE fromDate BETWEEN LIKE '%12/06/2012%' AND LIKE '%16/06/2012%'
Is something like this possible or is there a better way of doing this type of statement, because so far i have had little success?
I'm using Microsoft SQL server 2008.
Peter
Since your date values also include time, you can't use BETWEEN. The only safe way to do this is:
SELECT <cols> FROM dbo.table_name
WHERE CONVERT(DATE, fromDate, 103) >= '20120612'
AND CONVERT(DATE, fromDate, 103) < '20120617';
But as Martin noticed, you'll never be able to use an index on that column, so this will always perform a full table scan.
If you really, really want to use BETWEEN, converting to DATE is the only safe way to do so (well, or trimming the time off in other, less efficient ways):
SELECT <cols> FROM dbo.table_name
WHERE CONVERT(DATE, fromDate, 103) BETWEEN '20120612' AND '20120616';
But for consistency reasons I recommend against between even in that case.
Try This
SELECT * FROM table_name
WHERE Convert(Date,fromDate,103)
BETWEEN '20120612' AND '20120616'
The best solution is to store your varchars as DateTime in the database.
Second best is to convert then to dates in the select (as the other answers just indicates so I am not going to give the example)
The following works fine for me. Try this:
SELECT *
FROM [MABH-Desi-Dera].[dbo].[Order]
WHERE (CONVERT(nvarchar,[Order_ID]) BETWEEN '200622%' AND '200623%')
Here the Order_IDs start with some Date:
hi man this is not a rocket science bro
just make a logic like
Blockquote
SELECT * FROM table_name
WHERE fromDate BETWEEN '2021-05-01 12:00:00' AND '2021-05-01 23:59:00'
Blockquote
it will work I stuck too but it helps. i was also trying make a logic like u