Hi folks, need ur help.
I want to convert strings from a textfile and convert em to appropriate datatype for the destination columns, eg if i have a source value in string 11111 and the destination column is MONEY. I want to use CONVERT(functionretruningdatatype,'11111') in my insert statement.
Any guidance!
Howdy!SQL Server does implicit data type conversion. Refer to
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/tsqlref/ts_ca-co_2f3o.asp
If you need any conversion outside of the implicit conversions, you need to use dynamic SQL to construct the INSERT statement with the appropriate datatype
Showing posts with label folks. Show all posts
Showing posts with label folks. Show all posts
Thursday, February 16, 2012
Column Count Percentage of Not Null fields
Hello folks,
I am stuck at a problem, not sure on how to go about writing a query that will return as a percentage the number of fields in a row that are null.
For instance, a row from my table:
Row1 : field1 field2 field3
If field3 is empty or null, my query should return 67%.
So far I have gotten the number of fields:
select count(1) from information_schema.columns where table_name='myTable'
I could loop through the fields but I am sure there is a simpler way of doing it, I have seen something simpler in the past with some builtin SQL functions. I am using MS SQL 2005.
Thanks for your help
Mikelet me get this straight -- you don't really know which columns the table will have?|||Do you want to inspect the content of each column in each row OR
Is your intention instead to find the number of columns in a table that do not allow nulls?
select object_name(id),colcount=count(*)
,notnullablecount=sum(case when isnullable=0 then 1 else 0 end)
,nullablecount=sum(case when isnullable=1 then 1 else 0 end)
,'Notnullable%'=convert(int,sum(case when isnullable=0 then 1 else 0 end)*100./count(*)+.5)
from syscolumns
where id=object_id('myTable')
group by id
I am stuck at a problem, not sure on how to go about writing a query that will return as a percentage the number of fields in a row that are null.
For instance, a row from my table:
Row1 : field1 field2 field3
If field3 is empty or null, my query should return 67%.
So far I have gotten the number of fields:
select count(1) from information_schema.columns where table_name='myTable'
I could loop through the fields but I am sure there is a simpler way of doing it, I have seen something simpler in the past with some builtin SQL functions. I am using MS SQL 2005.
Thanks for your help
Mikelet me get this straight -- you don't really know which columns the table will have?|||Do you want to inspect the content of each column in each row OR
Is your intention instead to find the number of columns in a table that do not allow nulls?
select object_name(id),colcount=count(*)
,notnullablecount=sum(case when isnullable=0 then 1 else 0 end)
,nullablecount=sum(case when isnullable=1 then 1 else 0 end)
,'Notnullable%'=convert(int,sum(case when isnullable=0 then 1 else 0 end)*100./count(*)+.5)
from syscolumns
where id=object_id('myTable')
group by id
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