Converting ntext to nvcharmax(max) - Getting around size limitation
That is most likely because the column dataNVarChar is not defined as NVARCHAR(max)
To convert a column from NTEXT to NVARCHAR(MAX), use this
alter table TBL alter column COL nvarchar(max)
It will perform the conversion of the data in the column for you at the same time
Issue converting NTEXT & nvarchar(255) to nvarchar(max)
In the oledb source, write a select from the table and convert the column to NTEXT, i.e.
SELECT ..., Convert(ntext, Notes) as Notes
SQL Server, Converting NTEXT to NVARCHAR(MAX)
If you can't get scheduled downtime....
create two new columns:
nvarchar(max)
processedflag INT DEFAULT 0
Create a nonclustered index on the processedflag
You have UPDATE TOP available to you (you want to update top ordered by the primary key).
Simply set the processedflag to 1 during the update so that the next update will only update where the processed flag is still 0
You can use @@rowcount after the update to see if you can exit a loop.
I suggest using WAITFOR for a few seconds after each update query to give other queries a chance to acquire locks on the table and not to overload disk usage.
Cast string+ntext to nvarchar error
Try the following:
'String:'+ CAST([KlirAn] as NVARCHAR(max))
Convert ntext to numeric
You should be able to do this in two steps:
alter table tabl1 alter column [reg_no] nvarchar(max);
alter table tabl1 alter column [reg_no] numeric(38,0);
ntext
is deprecated and conversion to numeric
is not supported, but converting to nvarchar()
is supported.
This assumes that the values are compatible with numeric
. Otherwise you will get a type conversion error. If this happens, you can get the offending values by using:
select *
from t
where try_convert(numeric(38, 0), try_convert(nvarchar(max), x)) is null
T-SQL: Converting NTEXT to VARCHAR to INT/BIGINT
You can't control the order in which the where clause and conversions apply. In some cases SQL Server will attempt to perform the conversion on rows that wouldn't pass the filter - all depends on the plan. Try this instead:
SELECT CASE WHEN ID = 111 THEN
CONVERT(INT, CONVERT(VARCHAR(12), FileSize))
-- don't be lazy, size ------^^ is important
END
FROM dbo.myTable
WHERE ID = 111;
Also consider using an integer column to store integers. Then you don't end up with goofy nonsense in the FileSize
column like '7/1/2008 3:39:30 AM'
.
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