I want to update a databased based upon results from a case, however my "If" statement doesn't seem to pull information from the right table.
declare #dt datetime
set #dt = GETDATE()
select
Ugenummer = datepart(wk, #dt) - datepart(wk,dateadd(m, DATEDIFF(M, 0, #dt), 0)) + 1,
case when (datepart(wk, #dt) - datepart(wk,dateadd(m, DATEDIFF(M, 0, #dt), 0)) + 1) % 2 = 1
then 'ulige' else 'lige' end Ugelighed;
The above code gets the weeknumber (ugenummer) and determines whether it's odd or even (Ulige/lige)
IF Ugelighed = ulige and datepart(dw,#dt) = 1
THEN
UPDATE laeger
SET Antal=1
WHERE Navn=Lægenavn
I would like to use the information from the first code to update a database in a SQL 2008 server
You aren't using Ugenummer so I edited it out. Also created a variable for Ugelighed, you forgot to create one:
declare #dt datetime
set #dt = GETDATE()
declare #Ugelighed VARCHAR(5);
select
#Ugelighed=case when (datepart(wk, #dt) - datepart(wk,dateadd(m, DATEDIFF(M, 0, #dt), 0)) + 1) % 2 = 1
then 'ulige' else 'lige' end;
In the following statements I used variable #Ugelighed to compare to ulige however it is a VARCHAR so you need to enclose it in single quotes (''). Same for Lægenavn, it is a VARCHAR so enclose it in single quotes:
IF #Ugelighed = 'ulige' and datepart(dw,#dt) = 1
UPDATE laeger
SET Antal=1
WHERE Navn='Lægenavn'
Personally I would have created a BIT field for #Ugelighed since even/odd can be captured as a simple boolean rather than text.
Related
I would like to round up a value to the next nearest power of 2 in a mysql query, so
select RoundUpToNearestPowerOfTwo(700) -- Should give 1024
I need this solution as part of a much larger query to generate and read some bitmask. Using custom stored functions is not an option, since I cannot use those in our production environment, so I'm looking for a smart way to do this inline in the query.
[Edit]
One possible way I can think of, is creating some enumerator, use a power in that, and choose the smallest value larger than my value:
select
min(BOUND)
from
(select 700 as VALUE) v
inner join
(select
POW(2, #pow := #pow + 1) as BOUND
from
(select #pow := 0) x,
MY_RANDOM_TABLE t
) x on x.BOUND > v.VALUE
But as you can tell, it's pretty verbose, so a leaner solution would be welcome.
Try this.
FLOOR(POW(2,CEIL(LOG2(1025))))
The CEIL and FLOOR cope with the boundary conditions correctly.
Try this:
select power(2, 1 + floor(log2(XXX)))
MySQL conveniently has the log2() function, which does most of the work.
EDIT:
I think this may be what you want:
select (case when floor(log2(XXX)) <> log2(XXX)
then power(2, 1 + floor(log2(XXX)))
else power(2, floor(log2(XXX)))
end)
Or something like:
select power(2, 1 + floor(log2(XXX*0.999999)))
There is a boundary condition on actual powers of 2.
If you are using SQL Server then you can try this...just change value in variable #value for any value to get the next nearest power of 2
declare #count int = 1
declare #value int = 700
while (#value <> 1)
BEGIN
set #value = #value / 2
set #count = #count + 1
END
select power(2, #count)
How do I correctly replace the first character with 'M'? Suppose you have a PATIENT_ID_NONNUM = 'M001', and we want 1001 as a result.
UPDATE [HIMC_I2B2_LZ-PROD].[dbo].[I2B2_SRC_BIOMETRICS]
SET PATIENT_ID = CONVERT(NUMERIC(22,0),'1' + CONVERT(NVARCHAR(50),PATIENT_ID))
WHERE SUBSTRING(PATIENT_ID_NONNUM, 1, 1) = 'M'
EDIT:
UPDATE [HIMC_I2B2_LZ-PROD].[dbo].[I2B2_SRC_MEDICATION]
SET PATIENT_ID = CONVERT(NUMERIC(22,0),CONVERT(NVARCHAR(50),'1') + CONVERT(NVARCHAR(50),SUBSTRING(PATIENT_ID_NONNUM, 2, LEN(PATIENT_ID_NONNUM))))
WHERE SUBSTRING(PATIENT_ID_NONNUM, 1, 1) = 'M'
I find STUFF() (an often overlooked function) and LEFT() are a little more readable, but others may disagree:
UPDATE [HIMC_I2B2_LZ-PROD].[dbo].[I2B2_SRC_BIOMETRICS]
SET PATIENT_ID = CAST(STUFF(PATIENT_ID_NONNUM, 1, 1, '1') AS NUMERIC(22,0))
WHERE LEFT(PATIENT_ID_NONNUM, 1) = 'M'
I would suggest something like this:
UPDATE [HIMC_I2B2_LZ-PROD].[dbo].[I2B2_SRC_BIOMETRICS]
SET PATIENT_ID = CAST(('1' + SUBSTRING(PATIENT_ID_NONNUM, 2, LEN(PATIENT_ID_NONNUM) - 1)) AS NUMERIC(22,0))
WHERE SUBSTRING(PATIENT_ID_NONNUM, 1, 1) = 'M'
That's going to find all records where the first character is M, and replace the first character with a 1. I haven't tested this, but I believe it should work properly.
I would also suggest not running this type of operation on a production database as a test, which I would assume is what the -PROD stands for in your catalog name.
EDIT: Since it seems important that this query comes out with the PATIENT_ID as a NUMERIC(22,0), I've added the necessary CAST.
I am using MySQL to make a report showing the number of hours billed for a particular date range and project. The complexity is that the date range is variable for each project (different start month and start day). This information is coming from a value in another database/table.
I have the following UDF in MySQL:
DELIMITER //
CREATE FUNCTION TimeLeft(startday INT, today INT) RETURNS INT
DETERMINISTIC
BEGIN
DECLARE s INT;
IF startday < today THEN SET s = 0;
ELSE SET s = 1;
END IF;
RETURN s;
END //
DELIMITER;
I use that function in the following query, which is supposed to take the value returned in the TimeLeft function to determine the values for the start month (month(curdate())-#xx) and start day (#yy) for each project to calculate the hours:
AND time_records.record_date >= concat('2012/', month(curdate())-#xx , '/' , #yy)
Here's how I am setting the values for #xx and #yy:
SET #xx = 0; #this is the value that we will use to manipulate the month for the date range
SET #yy = 0;
#yy:= SELECT start_day_of_month FROM dashboard.client; #this doesn't seem to work
SELECT #xx:= TimeLeft(#yy,dayofmonth(curdate()));
I am getting some issues:
#yy is not getting the value - possibly my syntax is wrong?
The variables are set at the top of the code, so they are not getting changed for each project as they should be (there should be a different #xx and #yy for each project since each one has a different start and end date).
Here's the full query:
#below is where I assign the variables
SET #xx = 0; #this is the value that we will use to manipulate the month for the date range
SET #yy = 0;
#yy:= SELECT start_day_of_month FROM dashboard.client; #this doesn't seem to work
SELECT #xx:= TimeLeft(#yy,dayofmonth(curdate()));
# below is the MySQL query that is meant to use the variables assigned above
SELECT X.expr1 AS 'Project Name', #monthly_hours - SUM(X.expr2) AS 'Hours Billed
FROM
(SELECT
projects.name AS expr1
, sum(time_records.value) AS expr2
FROM project_objects
INNER JOIN projects
ON projects.id = project_objects.project_id
INNER JOIN time_records
ON time_records.parent_id = project_objects.id
WHERE time_records.parent_type = 'Task'
AND time_records.record_date >= concat('2012/', month(curdate())-#xx , '/' , #yy)
AND time_records.record_date <= curdate()
GROUP BY projects.name
UNION
SELECT
projects.name AS expr1
, sum(time_records.value) as expr2
FROM projects
INNER JOIN time_records
ON projects.id = time_records.parent_id
WHERE time_records.parent_type = 'Project'
AND time_records.record_date >= concat('2012/', month(curdate())-#xx , '/' , #yy)
AND time_records.record_date <= curdate()
GROUP BY projects.name) X
GROUP BY X.expr1
I think there is some issue of where I am assigning the variables #xx and #yy. These should be done for each individual Project, so putting them up on the top is probably not the best idea. I'm also not sure if I am assigning the #yy value correctly. It's supposed to query the value of the field of a table that is in another database but it keeps throwing a syntax error on the #yy assignment to that field.
Assign value to #yy inside select:
SELECT #yy:= start_day_of_month FROM dashboard.client;
I like to return only the first number of a text stored in a column of a database table.
User have put in page ranges into a field like 'p.2-5' or 'page 2 to 5' or '2 - 5'.
I am interested in the '2' here.
I tried to
SELECT SUBSTR(the_field, LOCATE('2', the_field, 1)) AS 'the_number'
FROM the_table
and it works. But how to get ANY number?
I tried
SELECT SUBSTR(the_field, LOCATE(REGEXP '[0-9], the_field, 1)) AS 'the_number'
FROM the_table
but this time I get an error.
Any ideas?
Just use REGEXP_SUBSTR():
SELECT REGEXP_SUBSTR(`the_field`,'^[0-9]+') AS `the_number` FROM `the_table`;
Notes:
I'm using MySQL Server v8.0.
This pattern assumes that the_field is trimmed. Otherwise, use TRIM() first.
REGEXP is not a function in MySQL, but something of an operator. Returns 1 if field matches the regular expression, or 0 if it does not. You cannot use it to figure out a position in a string.
Usage:
mysql> SELECT 'Monty!' REGEXP '.*';
-> 1
As for answer to the question: I don't think there is a simple way to do that using MySQL only. You would be better off processing that field in the code, or extract values before inserting.
For the specific case in the question. Where the String is {number}{string}{number}
there is a simple solution to get the first number. In our case we had numbers like 1/2,3
4-10
1,2
and we were looking for the first number in each row.
It turned out that for this case one can use convert function to convert it into number. MySQL will return the first number
select convert(the_field ,SIGNED) as the_first_number from the_table
or more hard core will be
SELECT
the_field,
#num := CONVERT(the_field, SIGNED) AS cast_num,
SUBSTRING(the_field, 1, LOCATE(#num, the_field) + LENGTH(#num) - 1) AS num_part,
SUBSTRING(the_field, LOCATE(#num, the_field) + LENGTH(#num)) AS txt_part
FROM the_table;
This was original post at source by Eamon Daly
What does it do?
#num := CONVERT(the_field, SIGNED) AS cast_num # try to convert it into a number
SUBSTRING(the_field, 1, LOCATE(#num, the_field) + LENGTH(#num) - 1) # gets the number by using the length and the location of #num in field
SUBSTRING(the_field, LOCATE(#num, the_field) + LENGTH(#num)) # finds the rest of the string after the number.
Some thoughts for future use
Its worth keeping another column which will hold the first number after you parsed it before insert it to the database. Actually this is what we are doing these days.
Edit
Just saw that you have text like p.2-5 and etc.. which means the above cannot work as if the string does not start with a number convert return zero
There's no built-in way that I know of, but here's a Mysql function you can define, this will do it (I didn't code for minus-signs or non-integers, but those could of course be added).
Once created, you can use it like any other function:
SELECT firstNumber(the_field) from the_table;
Here's the code:
DELIMITER //
CREATE FUNCTION firstNumber(s TEXT)
RETURNS INTEGER
COMMENT 'Returns the first integer found in a string'
DETERMINISTIC
BEGIN
DECLARE token TEXT DEFAULT '';
DECLARE len INTEGER DEFAULT 0;
DECLARE ind INTEGER DEFAULT 0;
DECLARE thisChar CHAR(1) DEFAULT ' ';
SET len = CHAR_LENGTH(s);
SET ind = 1;
WHILE ind <= len DO
SET thisChar = SUBSTRING(s, ind, 1);
IF (ORD(thisChar) >= 48 AND ORD(thisChar) <= 57) THEN
SET token = CONCAT(token, thisChar);
ELSEIF token <> '' THEN
SET ind = len + 1;
END IF;
SET ind = ind + 1;
END WHILE;
IF token = '' THEN
RETURN 0;
END IF;
RETURN token;
END //
DELIMITER ;
DECLARE #imgString varchar(800)
DECLARE #insertString varchar(3000)
DECLARE #imgNumber int
Declare #imgName varchar(100)
SET #imgNumber = 1
WHILE #imgNumber<> 101
BEGIN
SET #imgName = 'SELECT (items) FROM dbo.building_piclink'
SET #imgString = 'C:\Documents and Settings\Administrator\Desktop\photos\' + #imgName
SET #insertString = 'INSERT INTO dbo.building__ATTACH (DATA)
SELECT * FROM OPENROWSET(BULK N''' + #imgString + ''', SINGLE_BLOB) as tempImg'
SET #imgNumber = #imgNumber + 1
END
GO
I am having problems with the #imgName. I can't figure out how to get the value from the select statement not the (items) like below:
C:\Documents and Settings\Administrator\Desktop\photos\SELECT (items) FROM dbo.building_piclink
Thank you!
Your code has several problems:
1) You're selecting a file name from the view - but what if that view contains more than one entry?? Which filename are you selecting?? Your current code first of all doesn't work at all the way it is, and even if it were working - you're still potentially selecting hundreds of filenames into a single variable - which of course won't work....
So you'll need to fix this here first:
SET #imgName = 'SELECT (items) FROM dbo.building_piclink'
First of all - loose the single quotes:
SELECT #imgName = (items) FROM dbo.building_piclink
But now - do you have a unique ID that you can select for? Or do you want to get just the first entry (whatever that is) ??
So either you need:
SELECT #imgName = ImageFileName FROM dbo.building_piclink WHERE ..........
and fill in that WHERE clause with a condition that guarantees to return just a single row, or use TOP 1:
SELECT TOP (1) #imgName = ImageFileName FROM dbo.building_piclink
In that case - you'll just get exactly one filename - if you don't specify an ORDER BY, then there's no guarantee what you'll get - maybe you'll want to add a ORDER BY DueDate or something to prioritize which file names you get first.
2) Your code for loading the image data is non workable, either - what you need to do is build up the SQL statement as a string, and then execute it (called dynamic SQL) - something like this:
SET #imgString = 'C:\Documents and Settings\Administrator\Desktop\photos\' + #imgName
SET #insertString =
'INSERT INTO dbo.building__ATTACH (DATA)
SELECT * FROM OPENROWSET(BULK N''' + #imgString + ''', SINGLE_BLOB) as tempImg'
EXEC(#insertString) -- actually execute your SQL statement!
With these two fixes, you should be on the way to get this thing working