Sql-server – Conversion failed when converting the varchar value ‘Hours’ to data type int

sql serversql-server-2008

Conversion failed when converting the varchar value 'Hours' to data type int. This is my query:

Sum(Cast(Cast(DATEDIFF(HH, ld_time_tracker_start_time,
    fld_time_tracker_end_time)%3600/60 As int) +' Hours'+ 
Cast(DATEDIFF(MINUTE, ld_time_tracker_start_time,
 fld_time_tracker_end_time)As int )+'Minutes' As Int)) 
As [Time Spent(In hrs)]

I modified the above Code To:

+Cast('Hours' As Int)
+Covert(int,'Hours')

… and got the error message:

Conversion failed when converting the varchar value ' Hours' to data
type int

Best Answer

This is not clear what output is needed. You are trying to convert text strings to int. This obviously does not work. Besides this type of formatting might fit better outside of SQL Server.

If you want something like 5 Hours 15 Minutes you can try this query:

[Time Spent(In hrs)] =
    CAST(
        SUM(
            DATEDIFF(hour, ld_time_tracker_start_time, ld_time_tracker_end_time)                     
        )
    as varchar(10))
    +' Hours '+ 
    CAST(
        SUM(
            DATEDIFF(minute, ld_time_tracker_start_time, ld_time_tracker_end_time) % 60       
        )
    as varchar(10))
+' Minutes'

Note that I have replaced HH by hour. This is easier to read and understand and it avoid mistakes. See DATEDIFF (Transact-SQL).

Related Solutions

Sql-server – Getting “Conversion failed when converting the nvarchar value to data type int.”

Write your query this way. It includes a better test for integers and dumps ISNUMERIC that returns 1 for '-.', for example.

SELECT
    zip,
    coordinates
FROM (
    SELECT
        CASE WHEN ZIP5>'' AND NOT ZIP5 LIKE '%[^0-9]%' THEN
            CONVERT(int, [ZIP5]) END zip,
        CONVERT(varchar(max), geom) AS coordinates
    FROM 
        [SpatialData].[dbo].[zip5]
    WHERE
        ZIP5>'' AND NOT ZIP5 LIKE '%[^0-9]%'
) AS t1
WHERE
    zip >= 85000 AND
    zip < 86000

See this Connect item

SQL Server is free to evaluate the WHERE/SELECT clause in the order that it decides is optimized. A view or derived table is not materialized can easily be expanded into, from the outer query.

What SQL Server is compiling is really a query that looks like this

SELECT
    CONVERT(int, [ZIP5]) AS zip,
    CONVERT(varchar(max), geom) AS coordinates
FROM 
    [SpatialData].[dbo].[zip5]
WHERE
    ISNUMERIC([ZIP5]) = 1
    AND CONVERT(int, [ZIP5]) >= 85000
    AND CONVERT(int, [ZIP5]) < 86000

You can inspect the query plan of your original, but my guess from looking at the structure is that the WHERE clause uses the expression CONVERT(int, [ZIP5]) twice, so it makes sense to streamline the resolution (calculation to a result) of the expression in the process of retrieving data from the table. This puts the processing of the SELECT clause before the WHERE, so your ISNUMERIC() = 1 never got a chance to filter the bad eggs.

It is by-design.

Sql-server – Conversion failed when converting the nvarchar value ‘0.000000’ to data type int

In your code I see a CONVERT(NUMERIC,...) but not a CONVERT(INT,...). So where is the converting to data type int happening?

SELECT CONVERT(INT, N'0.0000')    -- Conversion failed message
SELECT CONVERT(NUMERIC, N'0.0000')-- Converts to 0

For what it is worth, if you do the following, you also get a '0'.

SELECT CONVERT(INT, CONVERT(NUMERIC, N'0.0000'))

It seems that FLEXFIELD4 is NVARCHAR. If there is some other conversion involved that your code does not show, then that might clarify the issue.

Best Answer

Related Solutions

Sql-server – Getting “Conversion failed when converting the nvarchar value to data type int.”

Sql-server – Conversion failed when converting the nvarchar value ‘0.000000’ to data type int

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