I am working with some legacy tables that represent time as a decimal representating time like this:
74447.548 = 7:44:47.548
I am moving this to a table where time is stored as (int) milliseconds. I want to create a function for this conversion.. The following works, but is there a more efficient way??
CREATE FUNCTION `test`.`decimalToMilli` (bigTime decimal)
RETURNS INTEGER
BEGIN
return (floor(mod(bigTime,floor(bigTime))*1000) -- milliseconds
+ (floor(bigTime) MOD 100) * 1000 -- seconds
+ ((((floor(bigTime) - floor(bigTime) MOD 100) MOD 10000))/100) * 1000*60 -- minutes
+ ((((floor(bigTime) - floor(bigTime) MOD 10000) MOD 1000000))/10000) * 1000*60*60 --hrs
);
END
Suggestions for a better way?
What about this?
CREATE FUNCTION `test`.`decimalToMilli` (bigTime decimal)
RETURNS INTEGER
BEGIN
return ((bigTime * 1000) MOD 100000 -- seconds and milliseconds
+ (floor(bigTime / 100) MOD 100) * 60000 --minutes
+ (floor(bigTime / 10000)) * 3600000 -- hours
);
END
Related
I'm using MySQL version: 5.7.22
I've got two columns Latitude and Longitude both in Degrees/Minutes/Seconds format that I want to convert to Decimal format ex: 48° 52.250' N to 48.93611111
I have the following script but I'm stuck at how to split the degrees minutes and seconds. I cannot hard-code the values as I've done here left(Latitude,2) since the degrees might have 3 decimals as well
SELECT Latitude,
left(Latitude, 2) +
(TRUNCATE((Latitude - TRUNCATE(Latitude)) * 100) / 60) +
(((Latitude * 100) - TRUNCATE(Latitude * 100)) * 100) / (60 * 60) AS DECIMAL_DEGREES
FROM small_ocean_data
The formula for the conversion is this: D + M/60 + S/3600 * -1 if direction in ['W', 'S'] else 1
Any help would be grateful!
Well if I use this formula of yours: D + M/60 + S/3600
Where I believe D is Degrees and M are Minutes and S are Seconds.
With this select:
select SUBSTRING_INDEX('48° 52.250', '°',1) +
(SUBSTRING_INDEX('48° 52.250',' ',1)/60) +
(SUBSTRING_INDEX('48° 52.250','.',1)/3600);
Or for your database:
select SUBSTRING_INDEX(Latitude, '°', 1) +
(SUBSTRING_INDEX(Latitude ,' ',1)/60) +
(SUBSTRING_INDEX(Latitude ,'.',1)/3600) "DECIMAL_DEGREES"
FROM small_ocean_data;
I get 48.81333333333333
48 + 0.8 + 0.013333333333333334
Here is the DEMO
Assume a service is billed in the following manner:
The first 60 seconds is charged at $1.00
Subsequent charges are billed at $0.25 per 10 second
The following are example computations:
32 seconds = $1.00
59 seconds = $1.00
60 seconds = $1.00
61 seconds = $1.25
69 seconds = $1.25
70 seconds = $1.25
71 seconds = $1.50
Is it possible to do this kind of computation in MySQL alone?
EDIT 1:
Does something like this work:
SELECT `call_length`,
( 1.00 + ( Round(( `call_length` - 30 ) / 10) * .25 ) ) AS `cost`
FROM `service`
SqlFiddleDemo
CREATE TABLE sec(val INT);
INSERT INTO sec
VALUES (32), (59), (60), (61), (69), (70), (71);
SELECT
val,
1.0 + CASE
WHEN val <= 60.0 THEN 0
WHEN val MOD 10 = 0 THEN 0.25 *((val - 60) DIV 10)
ELSE 0.25 * (((val - 60) DIV 10) + 1)
END AS charge
FROM sec;
EDIT:
Without CASE:
SqlFiddleDemo2
SELECT
call_length,
1.0 + IF( call_length <= 60, 0, 0.25 * CEIL((call_length - 60)/10)) AS cost
FROM service;
This is not much of a MySQL problem, unless the setting in which you need to perform the calculation is somehow difficult(?).
UPDATE ... SET cost_cents = 100 + CEIL(GREATEST(0, duration - 60)/10) * 25;
As a SELECT to match your edit,
SELECT `call_length`,
100 + CEIL(GREATEST(0, `call_length` - 60)/10) * 25 AS `cost`
FROM `service`
Note that this returns cents. For dollars, divide the result by 100...
SELECT `call_length`,
(100 + CEIL(GREATEST(0, `call_length` - 60)/10) * 25) / 100 AS `cost`
FROM `service`
I am trying to generate a random value between 0.01 - 0.50 to enter into mysql. I have 2.7 million rows that I need to execute this on.
Here is my script:
UPDATE FBAInventory SET buyBox = ROUND( 0.01 + RAND( ) * 8,2 );
It is generating values such as 4.20, 3.89 etc. I only want it to span from 0.01 - 0.50 and not to exceed this.
Does anyone know how to do this?
Thanks!
How about...
round(rand() * 0.49 + 0.01, 2);
You can use the floor function to generate a range of random numbers.
FLOOR(RAND() * (<max> - <min> + 1)) + <min>
where the max and min are inclusive. So in your case you would want
FLOOR(RAND() * 1.49 ) + 0.01
I have a worksheet where I have defined names for certain cells. These cells will be used in the function and I am calling them using their names.
However, I get 0 as a return of the function when I call it with Excel, as if the names were not linked or had a 0 value.
Below is the code I wrote. "Sum_Len_1", "L_W_2" ans "L_W_1" are the names I gave to the source cells.
Function min_w(depth)
If depth < Sum_Len_1 Then
min_w = L_W_1 * 0.868 * depth / 1000
Else
min_w = L_W_1 * 0.868 * Sum_Len_1 / 1000 + L_W_2 * 0.868 * (depth - Sum_Len_1) / 1000
End If
End Function
How can I solve the problem?
If you just write min_w = L_W_1 * 0.868 * depth / 1000 vba thinks L_W_1 it's variable (of the type variant with value=0).
You have to do it like this Range("L_W_1").Value to reference the named cell.
It should work if you change it to:
Function min_w(depth As Long)
If depth < Range("SUM_LEN_1").Value Then
min_w = Range("L_W_1").Value * 0.868 * depth / 1000
Else
min_w = Range("L_W_1").Value * 0.868 * Range("SUM_LEN_1").Value / 1000 + Range("L_W_2").Value * 0.868 * (depth - Range("SUM_LEN_1").Value) / 1000
End If
End Function
You can just put them in brackets to mark them as a range:
[Sum_Len_1].Value, [L_W_2].Value and [L_W_1].Value
Can I ask for help on a SQL Statement please, I have to do the calculation inline and cannot declare variables for it
Calculation:
-91000000 / 2700000 = -33.7037037037
I need the remainder (7037037037 - but only up to 6 characters ) to be multiplied by 15000
703703 / 15000 = Final Answer of 49.913533
I thought I could do this:
select cast(ParseName(abs(cast(-91000000 as decimal)/ 2700000 ) %1,1) as numeric(8,8)) / 15000
WITH cte AS
(
SELECT -91000000 AS x, 2700000 AS y
)
SELECT ABS(ROUND((CAST(x AS decimal) / CAST(y AS decimal)) - (x/y), 6)) * 1000000 / 15000 FROM CTE