I have a table where the column values are like '1.2.4.5', '3.11.0.6',
'3.9.3.14','1.4.5.6.7', N/A, etc.. I want to find the max of that particular column. However when i use this query i am not getting the max value.
(SELECT max (CASE WHEN mycolumn = 'N/A'
THEN '-1000'
ELSE mycolumn
END )
FROM mytable
WHERE column like 'abc')
I am getting 3.9.3.14 as max value instead of 3.11....
Can someone help me?
Those aren't really decimals - they're strings containing multiple dots, so it's unhelpful to think of them as being "decimals".
We can accomplish your query with a bit of manipulation. There is a type build into SQL Server that more naturally represents this type of structure - hierarchyid. If we convert your values to this type then we can find the MAX fairly easily:
declare #t table (val varchar(93) not null)
insert into #t(val) values
('1.2.4.5'),
('3.11.0.6'),
('3.9.3.14'),
('1.4.5.6.7')
select MAX(CONVERT(hierarchyid,'/' + REPLACE(val,'.','/') + '/')).ToString()
from #t
Result:
/3/11/0/6/
I leave the exercise of fully converting this string representation back into the original form as an exercise for the reader. Alternatively, I'd suggest that you may want to start storing your data using this datatype anyway.
MAX() on values stored as text performs an alphabetic sort.
Use FIRST_VALUE and HIERARCHYID:
SELECT DISTINCT FIRST_VALUE(t.mycolumn) OVER(
ORDER BY CONVERT(HIERARCHYID, '/' + REPLACE(NULLIF(t.mycolumn,'N/A'), '.', '/') + '/') DESC) AS [Max]
FROM #mytable t
Related
Ts there a way to extract numbers from a string?
In my database there is a column called Reference and it contains multiple numbers
CM|319|14163|||109|405000
Is there a way to get the first number like this?
select CM|%s|... as ParentId from table
So the output should be 319
And maybe even multiple like
select CM|...|%s|... as SiblingId, CM|%s|... as ParentId from table
14163 319
We might be able to use PATINDEX here along with a substring operation. We can find the position of the first number in the string, and then take a substring until one position past the first occurrence of a number followed by a pipe character.
SELECT SUBSTRING(val,
PATINDEX('%[0-9]%', val),
PATINDEX('%[0-9]|%', val) - PATINDEX('%[0-9]%', val) + 1)
FROM yourTable;
Demo
Data:
WITH yourTable AS (
SELECT 'CM|319|14163|||109|405000' AS val
)
if using sql2017 or later...
maybe?
CREATE TABLE #yourtable(
reference VARCHAR(50) NOT NULL PRIMARY KEY
);
INSERT INTO #yourtable(reference) VALUES ('CM|319|14163|||109|405000');
INSERT INTO #yourtable(reference) VALUES ('CMff123|14163|||109AA|4ZXC05000');
SELECT reference,
TRIM(REPLACE(TRANSLATE(reference,'abcdefghijklmnopqrstuvwxyz',REPLICATE('|',26)),'|',' ')) AS extracted
FROM #yourtable
This is the table which I have by name project and it contains 3 columns:
estimateId
name
projectName
I want to fetch data from SQL database based on maximum value of estimateId
but here estimateid is alphanumeric. How can I achieve this.
I need a SQL query to achieve this:
For example estimateId contains values like:
Elooo1
Elooo2
......
Elooo10
and so on. So how can I achieve this?
Setup Testing Data
DECLARE #tmpTable TABLE ( estimateId NVARCHAR(MAX));
INSERT into #tmpTable(estimateId) VALUES ('Elooo1'),('Elooo2'),('Elooo3'),('Elooo4'),('Elooo5'),('Elooo6');
Split data based on the pattern
SELECT T.prefix AS prefix, MAX(T.suffix) AS suffix, MAX(estimateId) AS estimateId FROM (SELECT estimateId,LEFT(estimateId, PATINDEX('%[a-zA-Z][^a-zA-Z]%', estimateId )) AS prefix,LTRIM(RIGHT(estimateId, LEN(estimateId) - PATINDEX('%[a-zA-Z][^a-zA-Z]%', estimateId ))) As suffix FROM #tmpTable) T GROUP BY T.prefix
Result
prefix suffix estimateId
Elooo 6 Elooo6
Reference
split alpha and numeric using sql
I just started SQL like today.. so i'm totally a newbie, but I think I could solve your problem. I would do something like this
SELECT name, projectName FROM table ORDER BY estimateId ASC
or (I think you will need ORDER BY ... DESC)
SELECT name, projectName FROM table ORDER BY estimateId DESC
You seem to be looking to extract the numeric part of the strings. Assuming that the strings have variable length, and that the numbers are always at the end, you can do:
try_cast(
substring(estimateId, patindex('%[0-9]%', estimateId), len(estimateId))
as int
)
This captures everything from the the first number in the string to the end of the string, and attempts to convert it to a number (if the conversion fails, try_cast() returns null rather than raising an error).
It is not very clear what you want to use this information for. For example, if you wanted to sort your data accordingly, you would do:
select *
from mytable
order by try_cast(
substring(estimateId, patindex('%[0-9]%', estimateId), len(estimateId))
as int
)
I'm curious on the data I get from someone. Most of the time I need to get 3 integers then a space then eight integers.
And The integration created a column varchar(20) ... Don't doubt it works, but that gives me some matching errors.
Because of this, I'd like to know what is the data type of the characters on each row.
For exemple : 0 is for integer, s for space, a for char, * for specific
AWB | data type
---------------------------------
012 12345678 | 000s00000000
9/5 ab0534 | 0*0saa0000
I'd like to know if there is a function or a formula to get this kind of results.
Right after I'll be able to group by this column and finally be able to check how good is the data quality.
I don't know if there is a specific word for what I tried to explain, so excuse me if this is a duplicate of a post, I didn't find it.
Thank you for your feedback.
There's nothing built-in, but you might use an approach like this:
DECLARE #tbl TABLE(ID INT IDENTITY,AWB VARCHAR(100));
INSERT INTO #tbl VALUES
('012 12345678')
,('9/5 ab0534');
WITH cte AS
(
SELECT t.ID
,t.AWB
,A.Nmbr
,C.YourMask
FROM #tbl t
CROSS APPLY (SELECT TOP (DATALENGTH(t.AWB)) ROW_NUMBER() OVER(ORDER BY (SELECT NULL)) FROM master..spt_values) A(Nmbr)
CROSS APPLY (SELECT SUBSTRING(t.AWB,A.Nmbr,1)) B(SingleCharacter)
CROSS APPLY (SELECT CASE WHEN B.SingleCharacter LIKE '[0-9]' THEN '0'
WHEN B.SingleCharacter LIKE '[a-z]' THEN 'a'
WHEN B.SingleCharacter = ' ' THEN 's'
ELSE '*' END) C(YourMask)
)
SELECT ID
,AWB
,(
SELECT YourMask
FROM cte cte2
WHERE cte2.ID=cte.ID
ORDER BY cte2.Nmbr
FOR XML PATH(''),TYPE
).value('.','nvarchar(max)') YourMaskConcatenated
FROM cte
GROUP BY ID,AWB;
The idea in short:
The cte will create a derived set of your table.
The first CROSS APPLY will create a list of numbers as long as the current AWB value.
The second CROSS APPLY will read each character separately.
The third CROSS APPLY will finally use some rather simple logic to translate your values to the mask you expect.
The final SELECT will then use GROUP BY and a correlated sub-query with FOR XML to get the mask characters re-concatenated (With version v2017+ this would be easier calling STRING_AGG()).
I have a TEXT column in my Table T and contains some values separated by Commas.
Example
Columns BNFT has text values such as
B20,B30,B3,B13,B31,B14,B25,B29,B1,B2,B4,B5
OR
B1,B2,B34,B31,B8,B4,B5,B33,B30,B20,B3
I want to return result in my query only if B3 is present.
It should not consider B30-B39 or B[1-9]3 (i.e. B13, B23 .... B93).
I tried with below query, but want to implement REGEXP or REGEXP_LIKE/INSTR etc. Haven't used them before and unable to understand also.
Select *
FROM T
Where BNFT LIKE '%B3,%' or BNFT LIKE '%B3'
Pls advise
Procedures will not work. Query must start with Select as 1st statement.
The first advice is to fix your data structure. Storing lists of ids in strings is a bad idea:
You are storing numbers as strings. That is the wrong representation.
You are storing multiple values in a string column. That is not using SQL correctly.
These values are probably ids. You cannot declare proper foreign key relationships.
SQL does not have particularly strong string functions.
The resulting query cannot take advantage of indexes.
That said, sometimes we are stuck with other people's bad design decisions.
In SQL Server, you would do:
where ',' + BNFT + ',' LIKE '%,33,%'
This question was originally tagged MySQL, which offers find_in_set() for this purpose:
Where find_in_set(33, BNFT) > 0
Select *
FROM T
Where ',' + BNFT + ',' LIKE '%,B3,%';
or
Select *
FROM T
Where CHARINDEX (',B3,',',' + BNFT + ',') > 0;
This can be easily achieve by CTE, REGEXP/REGEXP_Like/INSTR works better with oracle, for MS SQL Server you can try this
DECLARE #CSV VARCHAR(100) ='B2,B34,B31,B8,B4,B5,B33,B30,B20,B3';
SET #CSV = #CSV+',';
WITH CTE AS
(
SELECT SUBSTRING(#CSV,1,CHARINDEX(',',#CSV,1)-1) AS VAL, SUBSTRING(#CSV,CHARINDEX(',',#CSV,1)+1,LEN(#CSV)) AS REM
UNION ALL
SELECT SUBSTRING(A.REM,1,CHARINDEX(',',A.REM,1)-1)AS VAL, SUBSTRING(A.REM,CHARINDEX(',',A.REM,1)+1,LEN(A.REM))
FROM CTE A WHERE LEN(A.REM)>=1
) SELECT VAL FROM CTE
WHERE VAL='B3'
This may be simple, but I am no SQL whiz so I am getting lost. I understand that sql takes your query and executes it in a certain order, which I believe is why this query does not work:
select * from purchaseorders
where IsNumeric(purchase_order_number) = 1
and cast(purchase_order_number as int) >= 7
MOST of the purchar_order_number fields are numeric, but we introduce alphanumeric ones recently. The data I am trying to get is to see if '7' is greater than the highest numeric purchase_order_number.
The Numeric() function filters out the alphanumeric fields fine, but doing the subsequent cast comparison throws this error:
Conversion failed when converting the nvarchar value '124-4356AB' to data type int.
I am not asking what the error means, that is obvious. I am asking if there is a way to accomplish what I want in a single query, preferably in the where clause due to ORM constraints.
does this work for you?
select * from purchaseorders
where (case when IsNumeric(purchase_order_number) = 1
then cast(purchase_order_number as int)
else 0 end) >= 7
You can do a select with a subselect
select * from (
select * from purchaseorders
where IsNumeric(purchase_order_number) = 1) as correct_orders
where cast(purchase_order_number as int) >= 7
try this:
select * from purchaseorders
where try_cast(purchase_order_number as int) >= 7
have to check which column has numeric values only.
Currently, in a table every field is setted with nvarchar(max) Like tableName (field1 nvarchar(max),field2 nvarchar(max),field3 nvarchar(3)) and tableName has 25lac Rows.
But on manually Check Field2 Contain the numeric Values Only... How to Check With t-sql that in the Complete Column (Field2) has numeric Value or not/null value with Longest Length in the Column!