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SQLite nvarchar(100) field can accept 200 char field. Why?


SQLite nvarchar(100) field can accept 200 char field. Why?

By : user2954715
Date : November 22 2020, 10:31 AM
To fix the issue you can do SQLite has a single unlimited TEXT datatype. See the documentation:
http://www.sqlite.org/datatype3.html#affname
code :


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At what point does it become more efficient to use a text field than an nvarchar field in SQL Server?

At what point does it become more efficient to use a text field than an nvarchar field in SQL Server?


By : Gian
Date : March 29 2020, 07:55 AM
should help you out From what I understand, the TEXT datatype should never be used in SQL 2005+. You should start using VARCHAR(MAX) instead.
See this question about VARCHAR(MAX) vs. TEXT.
How to update all varchar, nvarchar or char field of a SQL Server database and set empty string in the place of NULL?

How to update all varchar, nvarchar or char field of a SQL Server database and set empty string in the place of NULL?


By : Yang Mulia
Date : March 29 2020, 07:55 AM
wish of those help In my database there are a lot of NULL values. Now I need to replace all the NULL values and set them to empty strings instead, because my existing software has problems with NULL values. , Hurraaaaaaaaa I found the answer......
code :
declare @query varchar(MAX)
SET @query='';
select @query=@query+' UPDATE '+table_name+' SET '+column_name+' = isnull('+column_name+','''');'
from (
    SELECT table_name=sysobjects.name,
             column_name=syscolumns.name
        FROM sysobjects 
        JOIN syscolumns ON sysobjects.id = syscolumns.id
        JOIN systypes ON syscolumns.xtype=systypes.xtype
       WHERE sysobjects.xtype='U' and (systypes.name='nvarchar' or systypes.name='varchar' or systypes.name='char')
) as a

exec (@query)
Convert Char field to Date field and remove time from the field name

Convert Char field to Date field and remove time from the field name


By : someone
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I am using the following command to remove the time from the date field: , Yes, you should use format()
code :
format(Fields!YourField.Value, "MM/dd/yyyy")
Oracle Column Constraint on char(4) field to not accept insert of 3 char value

Oracle Column Constraint on char(4) field to not accept insert of 3 char value


By : user3339861
Date : March 29 2020, 07:55 AM
Does that help You could always try adding a constraint that checks the length of your string is 4, after having stripped off any spaces:
code :
create table test1 (col1 char(4));

alter table test1 add constraint t1_chk check (length(trim(col1)) = 4);

-- the following inserts ok
insert into test1 values ('1234');

-- the following fails
insert into test1 values ('112 ');

commit;
Alter Field Type from nvarchar(255) to nvarchar(Max) in SQL Server 2005

Alter Field Type from nvarchar(255) to nvarchar(Max) in SQL Server 2005


By : siloportem
Date : March 29 2020, 07:55 AM
it should still fix some issue You must first drop what we presume is the Default constraint on the column before you alter its data type:
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