I have this Filenet query:
SELECT
[This], [Ente], [IDAtto], [Numero], [Tipologia], [DataEmissione]
FROM
[AttoNormativo]
WHERE
([DataEmissione] > 20160405T215959Z AND [DataEmissione] < 20160408T220001Z)
ORDER BY
[DataEmissione] desc, [Tipologia], [Numero], [Ente]
OPTIONS (TIMELIMIT 180)
The problem is that [Numero] property is string type, so it does not order properly. There is some cast function that I can use to convert it numeric?
Thank you very much.
No, there is not. According to the docs the orderby is a property_spec followed optionally by ASC or DESC.
<orderby> ::= <property_spec> [ ASC | DESC ]
The only function allowed in the ORDER BY is COALESCE() which can be used to provide a default sorting value when the data is null.
As per the documentation, properties of type Boolean, DateTime, Float64, ID, Integer32, and Object may appear in an ORDER BY clause, along with short String properties. Neither Binary nor long String properties may be used to order a query.
You can define a custom string property to store in either a short or long database column by setting the UsesLongColumn property when the property is created.
Now - if you are worried about the null values, then you may consider using the COALESCE function.
<orderby> ::= [ COALESCE '(' <property_spec>, <literal> ')' || <property_spec> ] [ ASC | DESC ]
You can find more about Relational Queries - here.
Related
I have a TERADATA dataset that resembles the below :
'Project: Hercules IssueType: Improvement Components: core AffectsVersions: 2.4.1 Priority: Minor Time: 15:25:23 04/06/2020'
I want to extract tag value from the above based on the key.
Ex:
with comm as
(
select 'Project: Hercules IssueType: Improvement Components: core AffectsVersions: 2.4.1 Priority: Minor' as text
)
select regexp_substr(comm.text,'[^: ]+',1,4)
from comm where regexp_substr(comm.text,'[^: ]+',1,3) = 'IssueType';
Is there a way to query without having to change the position arguments for every tag.
Also I am finding the last field a little tricky with date & time fields.
Any help is appreciated.
Thank you.
There's the NVP function to access Name/Value-pair data, but to split into multiple rows you need either strtok_split_to_table or regexp_split_to_table. The tricky part in your case are the delimiters, would be easier if they were unique instead of ' 'and ':':
WITH comm AS
(
SELECT 1 as keycol, -- should be a key column in your table, either numeric or varchar
'Project: Hercules IssueType: Improvement Components: core AffectsVersions: 2.4.1 Priority: Minor Time: 15:25:23 04/06/2020' AS text
)
SELECT id, tokennum, token,
-- get the key
StrTok(token,':', 1) AS "Key",
-- get the value (can't use StrTok because of ':' delimiter)
Substring(token From Position(': ' IN token)+2) AS "Value"
FROM TABLE
( RegExp_Split_To_Table(comm.keycol
,comm.text
,'( )(?=[^ ]+: )' -- assuming names don't contain spaces: split at the last space before ': '
, 'c')
RETURNS (id INT , tokennum INTEGER, token VARCHAR(1000) CHARACTER SET Latin)) AS dt
How do I replace empty (non null) column of string datatype with null value?
So say the following query returns non zero recordset:-
mytable | where mycol == ""
Now these are the rows with mycol containing empty strings. I want to replace these with nulls. Now, from what I have read in the kusto documentation we have datatype specific null literals such as int(null),datetime(null),guid(null) etc. But there is no string(null). The closest to string is guid, but when I use it in the following manner, I get an error:-
mytable | where mycol == "" | extend test = translate(mycol,guid(null))
The error:-
translate(): argument #0 must be string literal
So what is the way out then?
Update:-
datatable(n:int,s:string)
[
10,"hello",
10,"",
11,"world",
11,"",
12,""
]
| summarize myset=make_set(s) by n
If you execute this, you can see that empty strings are being considered as part of sets. I don't want this, no such empty strings should be part of my array. But at the same time I don't want to lose value of n, and this is exactly what will happen if I if I use isnotempty function. So in the following example, you can see that the row where n=12 is not returned, there is no need to skip n=12, one could always get an empty array:-
datatable(n:int,s:string)
[
10,"hello",
10,"",
11,"world",
11,"",
12,""
]
| where isnotempty(s)
| summarize myset=make_set(s) by n
There's currently no support for null values for the string datatype: https://learn.microsoft.com/en-us/azure/kusto/query/scalar-data-types/null-values
I'm pretty certain that in itself, that shouldn't block you from reaching your end goal, but that goal isn't currently clear.
[update based on your update:]
datatable(n:int,s:string)
[
10,"hello",
10,"",
11,"world",
11,"",
12,""
]
| summarize make_set(todynamic(s)) by n
I have a query:
SELECT [Theme].[PK_Theme], [Theme].[Name], [ThemeType].[Type]
FROM [Theme]
LEFT OUTER JOIN [ThemeType]
ON [Theme].[ThemeTypeId] = [ThemeType].[PK_ThemeType]
JOIN [ProductTheme] ON [ProductTheme].[ThemeId]=[Theme].[PK_Theme]
WHERE ProductTheme.ProductID LIKE '%'
AND ProductTheme.ThemeId = Theme.PK_Theme
AND COALESCE([THEME].[THEMETYPEID], 'null') LIKE '%'
GROUP BY [Theme].[Name], [ThemeType].[Type], [Theme].[PK_Theme]
ORDER BY CASE WHEN [ThemeType].[Type] IS NULL THEN 0 ELSE 1 END, [Theme].[Name]
The reason the LIKEs are there is because the '%' is actually parametrized using asp.net server control.
This query results in the following:
You cant see all of the returned data but [Theme].[Name] is in alphabetical order within two segments, 1st where [ThemeType].[Type] is NULL then where it is not null. [Theme].[PK_Theme] is the primary key that is associated with [Theme].[Name].
The way the tables are associated is that Theme has a column called ThemeTypeId which is a foreign key of the primary key on the ThemeType table.
Now here is my issue, currently ThemeTypeId is of VARCHAR(50) data type, I need it to be INT. I see the issue is:
COALESCE([THEME].[THEMETYPEID], 'null')
This results in the following error:
Conversion failed when converting the varchar value 'NULL' to data type int.
However, if I change null to NULL nothing is returned, if I change it to 0 only the NULL's are returned. I need bothNULL` and non-Null returned as was previously accomplished above. How do I do this?
The obvious thing to do is to remove the line
AND COALESCE([THEME].[THEMETYPEID], 'null') LIKE '%'
from the where clause. The like is doing an is not null, and you are converting NULL values anyway. So the line is not needed.
If you cannot do that, can you do this?
AND COALESCE(cast([THEME].[THEMETYPEID] as varchar(255)), 'null') LIKE '%'
Or this?
AND [THEME].[THEMETYPEID] is not null
If you're using an int instead of a varchar, you need to alter the following line:
AND COALESCE([THEME].[THEMETYPEID], 'null') LIKE '%'
to something like
AND COALESCE([THEME].[THEMETYPEID], 0) = 0%
This assumes that % is simply replaced by the numeric value when one is supplied, and a blank for null. If is more complex than that, the '%' may need to appear more than once in this query (which your control may not support).
I'm getting a confusing select...where result, the table definition is:
CREATE TABLE modes (
key INTEGER,
mode INTEGER,
channel INTEGER,
name TEXT,
short_name TEXT,
def INTEGER,
highlight INTEGER,
catagory TEXT,
subcatagory TEXT);
It's populated with:
sqlite> select * from modes;
3|6|5|Green|G|0|255|a|b
3|6|6|Blue|B|0|255|a|b
3|9|1|Mode|Mode|0|255|a|b
3|9|2|Auto Mode Speed|Speed|0|255|a|b
3|9|3|Strobe|Strobe|0|255|a|b
3|9|4|Red|R|0|255|a|b
3|9|5|Green|G|0|255|a|b
3|9|6|Blue|B|0|255|a|b
3|9|7|Red2|R2|0|255|a|b
3|9|8|Green2|G2|0|255|a|b
3|9|9|Blue2|B2|0|255|a|b
3|6|4|Red|R|0|255|a|b
3|6|1|6|6|0|255|a|b
3|6|2|Auto mode speed|speed|0|255|a|b
3|6|3|Strobe|Strobe|0|255|strobe|b
Note the row 3rd from the bottom:
3|6|1|6|6|0|255|a|b
If I do a select:
SELECT * FROM modes where mode=6 and name="Mode" order by channel;
It returns:
3|6|1|6|6|0|255|a|b
Columns 4 and 5 (name and short_name) should not match, they are 6 and the match term is "Mode". If I change the match string "Mode" to any other string it works as expected. Is "Mode" a reserved word? or Did I somehow set a variable "Mode" to 6?. I don't understand this behavior.
If you use ["] it means columns, so when you do
name="Mode"
it means you search in column name that have same value as column Mode. So you select where mode=6 and name=6 actually on your code.
If you want to use string, use ['] not ["]
I try to use that code on my database..
select * from products
where name="Mode"
And I got error
ERROR: column "Mode" does not exist
LINE 2: where name="Mode"
I finally found it in the docs if anyone else is looking.
it's in the the sqlite3 FAQ
My familiarity is not with sqlite3, but I would say that it looks to me like you are doing name="Mode" which is taking the modes.mode object and checking it.
If you do SELECT * FROM modes where name="Mode" order by channel. You may find that it just gives you 3|6|1|6|6|0|255|a|b as well.
It seems like a dumb question, and yet. It could be my IDE that's goofing me up. Here's the code (this is generated from DbLinq):
SELECT pics$.Caption, pics$.Id, pics$.Path, pics$.Public, pics$.Active, portpics$.PortfolioID
FROM main.Pictures pics$
inner join main.PortfolioPictures portpics$ on pics$.Id = portpics$.PictureId
WHERE portpics$.PortfolioId = 1 AND pics$.Id > 0
--AND pics$.Active = 1 AND pics$.Public = 1
ORDER BY pics$.Id
If I run this query I get three rows back, with two boolean fields called Active and Public. Adding in the commented out line returns no rows. Changing the line to any of the following:
pics$.Active = 'TRUE'
pics$.Active = 't'
pics$.Active = boolean(1)
It doesn't work. Either errors or no results. I've googled for this and found a dearth of actual SQL queries out there. And here we are.
So: how do I use a boolean field in a where clause in SQLite?
IDE is SQLite Administrator.
Update: Well, I found the answer. SQLite Administrator will let you make up your own types apparently; the create SQL that gets generated looks like this:
CREATE TABLE [Pictures] ([Id] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
[Path] VARCHAR(50) UNIQUE NOT NULL,[Caption] varchAR(50) NULL,
[Public] BOOLEAN DEFAULT '0' NOT NULL,[Active] BOOLEAN DEFAULT '1' NOT NULL)
The fix for the query is
AND pics$.Active = 'Y' AND pics$.Public = 'Y'
The real issue here is, as the first answerer pointed out, there is no boolean type in SQLite. Not an issue, but something to be aware of. I'm using DbLinq to generate my data layer; maybe it shouldn't allow mapping of types that SQLite doesn't support. Or it should map all types that aren't native to SQLite to a string type.
You don't need to use any comparison operator in order to compare a boolean value in your where clause.
If your 'boolean' column is named is_selectable, your where clause would simply be:
WHERE is_selectable
SQLite does not have the boolean type: What datatypes does SQLite support?
The commented-out line as it is should work, just use integer values of 1 and 0 in your data to represent a boolean.
SQLite has no built-in boolean type - you have to use an integer instead. Also, when you're comparing the value to 'TRUE' and 't', you're comparing it to those values as strings, not as booleans or integers, and therefore the comparison will always fail.
Source: http://www.sqlite.org/datatype3.html
--> This Will Give You Result having False Value of is_online field
select * from device_master where is_online!=1
--> This Will Give You Result having True Value of is_online field
select * from device_master where is_online=1