I have an issue with the SUM-Function in my MySQL Workbench. When I use the function, it returns a false value.
I´d like to SUM these three numbers:
56,03
35,59
54,35
The result should be 145,97, but its just 145 instead. I tried these different codes:
SELECT SUM(price) FROM table;
This one returns the value 145.
SELECT ROUND(SUM(price),2) FROM table;
The second one returns the value 145.00.
I was wondering whats wrong with the code, because I tried it in another DB that I have in my MySQL Workbench. Also tried it over the Terminal in both databases. In the other database the function works correctly.
Best thing to do would be to change your table so that it is a decimal field.
However, if you can't do that, the following query should get what you want:
SELECT SUM(replace(price,',', '.')) FROM tbl;
You can test in on SQLFiddle
Related
I'm working of generating sql request by parsing Excel-like formulas.
So for a given formula, I get this request :
SELECT IF(COL1='Y', SUM(EXPR),NULL)
FROM Table
I don't get the results I want. If I manually rewrite the request like this it works :
SELECT SUM(IF(COL1='Y', EXPR, NULL))
FROM Table
Also, the first request produces the right value if I add a GROUP BY statement, for COL1='Y' row :
SELECT IF(COL1='Y', SUM(EXPR),NULL)
FROM Table
GROUP BY COL1
Is there a way to keep the first syntax IF(COND, SUM(EXPR), NULL) and slightly edit it to make it works without a GROUP BY statement ?
You have to use GROUP BY since you are using SUM - otherwise SQL engine is not able to tell how do you want to summarize the column.
Alternatively you could summarize this column only:
SELECT SUM(EXPR)
FROM Table
WHERE COL1='Y'
But then you would have to run separate query for each such column, read: not recommended for performance reasons.
In my table I have a field with data such as 1,61,34, and I need to see if a variable is in that.
So far I have this
SELECT id, name FROM siv_forms WHERE LOCATE(TheVariable, siteIds) > 0
Which works, with the exception that if the siteIds were 2,61,53, and TheVariable was 1, it would return the row as there is a 1 in 61. Is there anyway around this using native MySql, or would I need to just loop the results in PHP and filter the siteIds that way?
I've looked through the list of string functions in MySql and can't see anything that would do what I'm after.
Try with find_in_set function.
SELECT id, name FROM siv_forms WHERE find_in_set(TheVariable, siteIds);
Check Manual for find_in_set function.
I am trying to fetch data from mySQL table and show it in jsp,
I want to sort data in mySQL table alphabetically before fetching it.
I wrote this query which works perfectly. (shows sorted data)
String _snackListQuery ="SELECT snackID,snackName FROM snacklist ORDER BY snackName";
But This query is not working, (Shows nothing at all)
String _snackListQuery ="SELECT snackID,snackName FROM snacklist WHERE snackHideFlag=1 ORDER BY snackName";
What am I doing wrong? Is this a right query?
EDIT- my table goes like this
AS the type you're checking is a boolean, the proper operator to use is IS. Try replacing snackHideFlag = 1 with snackHideFlag IS true
It sounds more complicated than it actually is. Here is what I'm trying to do within the SELECT part:
SELECT TIMESTAMPADD(
UCASE(
SUBSTRING(offset_unit,1,CHAR_LENGTH(offset_unit)-1)
),1,'2003-01-02') as offset_date
offset_unit is a VARCHAR column in the database. It contains one of the following: "Hours","Minutes".
offset is an INT.
I am trying to convert the offset_unit to uppercase, after I have removed the last character ('s') so I can have a proper interval (MINUTE, HOUR...) so I can get a date that I can use in sorting afterwards, but MySQL keeps throwing an error. I have tested each step by adding one function at a time, and it only fails after I add TIMESTAMPADD. If I enter MINUTE manually then it works.
Any way to get this working?
Additional info: I am running this in CakePHP 1.3, in a find, within the 'fields' array, but that shouldn't be important.
this can be easily achived by using CASE WHEN clause as:
SELECT (CASE
WHEN offset_unit = 'HOURS'
THEN TIMESTAMPADD(HOUR,`offset`,'2003-01-02')
WHEN offset_unit = 'MINUTES'
THEN TIMESTAMPADD(MINUTE,`offset`,'2003-01-02')
END) AS offset_date
FROM my_table;
SEE SQLFIDDLE DEMO HERE
It doesn't work because TIMESTAMPADD does not take a string as the first argument, but a unit keyword, for example MINUTE. My guess is that you need to do this in two steps, first get the unit and then construct a query with the correct keyword.
I have an SQL table called "tbl_einheit". phpmyadmin shows more than 14.000 rows in the table. When accessing via webpage, the table is empty "eof".
I minimized the SQL Statment, and deleted all WHERE, ORDER BY elements, so that simply
SELECT * FROM tbl_einheit
is the statement. But it still returns an empty result set. I also tried
SELECT E . * FROM tbl_einheit E, ( SELECT #a := NULL ) AS init LIMIT 0,30
but also empty.
Any suggestions?
the reason is you have some data type in your mysql dtaabse that ADODB connector in ASSp can't recognize, so asp thinks it is EOF.
use CAST in MySQL to convert data type to something asp can understand, example:
SELECT CAST(SUM(Entry_Data_1) as UNSIGNED) as score FROM contests_entries
Put a trace in your code to make sure you are executing the code you think you are.
Double-check your connection string.