teradata

问题 I have something like this: ID Result 1 value1 2 value1 2 value2 3 value1 4 value1 4 value2 4 value3 And I'd like to return something like this: ID Result1 Result2 Result3 1 value1 2 value1 value2 3 value1 4 value1 value2 value3 I've searched on pivots and concats and breaks and I just can't find a simple, sensible solution. TIA 回答1: Unfortunately Teradata doesn't have a PIVOT function but you can use an aggregate function with a CASE expression to get the result. select id, max(case when seq

问题 Can we delete duplicate records from a multiset table in teradata without using intermediate table. Suppose we have 2 rows with values 1, 2, 3 and 1, 2, 3 in my multiset table then after delete i should have only one row i.e. 1, 2, 3. 回答1: You can't unless the ROWID usage has been enabled on your system (and probablity is quite low). You can easily test it by trying to explain a SELECT ROWID FROM table; Otherwise there are two possible ways. Low number of duplicates: create a new table as

问题 Is there any way to submit dynamically generated SQL to Teradata? I've written a query that will create the code to denormalize a table. Right now, I am pulling the code down to my client (SAS) and resubmitting it in a second step. I am not familiar with either Teradata macros or procedures; would something like that work? To illustrate, I have a table defined like this: create multiset table MYTABLE ( RECID integer generated always as identity ( start with 1 increment by 1 minvalue

问题 I am trying to extract the date and time from a field in Teradata. The field in question is: VwNIMEventFct.EVENT_GMT_TIMESTAMP Here is what the data look like: 01/02/2012 12:18:59.306000 I'd like the date and time only. I have tried using EXTRACT(Date , EXTRACT(DAY_HOUR and a few others with no success. DATE_FORMAT() does not appear to work since I'm on Teradata. How would I select the date and time from VwNIMEventFct.EVENT_GMT_TIMESTAMP ? 回答1: If the datatype of EVENT_GMT_TIMESTAMP is a

问题 I'm selecting from a table with a timestamp(6) data type. I would like to get the date and time, to the minute, like so: Currently the data look like this: 03/10/2014 21:54:47.690000 I would like to select so that the result looks like this: 03/10/2014 21:54:47 I tried this: SELECT CAST(EVENT_GMT_TIMESTAMP AS DATE) || (EVENT_GMT_TIMESTAMP AS TIME) AS theDate, SUM(VwNIMEventFct.DWELL_MINUTES) AS totalDwellMins FROM RDMAVWSANDBOX.VwNIMEventFct WHERE EXTRACT(MONTH FROM EVENT_GMT_TIMESTAMP) = 4

问题 my code below, whoch I've copied from a Yahoo Developers articles and changed accordingly, for Query, I want to copy and paste 2999 rows of insert statements from excel to Teradata. My current way doesn't copy and paste the entire range. If I swap this for: Cells(1, 1) & " " & Cells(2, 1) & " " & Cells(3, 1)....etc. until Cells(2999), it would work. A clever, simpler way of doing this please? As an aside, would you recommend an alternative method of inserting 2999 rows. The tables are already

问题 Can somebody please explain the following result I get in Teradata: SELECT TYPE(CAST (2.3 AS DECIMAL(18,4)) * CAST (2.3 AS DECIMAL(18,4)) ) The result is: DECIMAL(18,8) I was expecting DECIMAL(18,4) 回答1: Every DBMS has it's own rules regarding calculations involving Decimals. Teradata's basic rules are: When you add/substract/divide DECIMALs the resulting fractional precision is the greater of both operands, e.g. dec(10,2) + dec(10,4) = dec(xx,4) But when you multiply the fractional digits

问题 I read the post: Turning a Comma Separated string into individual rows And really like the solution: SELECT A.OtherID, Split.a.value('.', 'VARCHAR(100)') AS Data FROM ( SELECT OtherID, CAST ('<M>' + REPLACE(Data, ',', '</M><M>') + '</M>' AS XML) AS Data FROM Table1 ) AS A CROSS APPLY Data.nodes ('/M') AS Split(a); But it did not work when I tried to apply the method in Teradata for a similar question. Here is the summarized error code: select failed 3707: expected something between '.' and

问题 I have multiple strings of the form {key1=value, key2=value2, key3=value3 ...} with a known set of keys. The key names are set and known, with only the values changing between records. I would like to tokenize the string with the space delimiter as my tokenizing character then strip off the key names and assign each one to a column in sequential order. Is this something I can do in-database in teradata 15? 回答1: Starting with TD14 there's NVP to extract data from name-value-pairs, e.g. NVP(col

问题 I'm trying to convert a date format stored m/d/yyyy to a 'yyyymmdd' character format, without the need to cast the date column every time I want to use the column in my query. Currently I'm casting and formatting dates as chars: ((cast(cast(invitation_date as CHAR(8)) as date format 'YYYYMMDD')) . Is there a way to convert the data column once and call the converted character value later in the query? I'm using Teradata in Aqua Data Studio 13.0.3. 回答1: If source is a DECIMAL yyyymmdd you can