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Remove first 3 characters from a field in the database


Remove first 3 characters from a field in the database

By : kiho choi
Date : November 18 2020, 03:49 PM
hope this fix your issue I've doctor entries in my database and I want to remove the first 3 characters from their name. , One time all-db change:
code :
for doctor in Doctor.objects.all():
   doctor.name = doctor.name[3:]
   doctor.save()
class Doctor(Model):
   name = CharField(...)

   @property
   def masked_name(self):
       return self.name[3:]

   # To access to property you just use doctor.masked_name on an instance of the Doctor class (it's a property, you don't have to call doctor.masked_name())


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How do I remove the first 8 characters from a Microsoft Access database field?

How do I remove the first 8 characters from a Microsoft Access database field?


By : MuhGhunaim
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I don't know what your skill level is, but the easiest approach would be to import the data to a temporary table, and then do a make-table query. On the make-table query, bring that column in using mid() function:
code :
mid([your field name], 9, [max number of chars to span])
Remove special characters from a database field

Remove special characters from a database field


By : Riyah
Date : March 29 2020, 07:55 AM
With these it helps I have a database with several thousand records, and I need to strip down one of the fields to ensure that it only contains certain characters (Alphanumeric, spaces, and single quotes). What SQL can I use to strip any other characters (such as slashes, etc) from that field in the whole database?
code :
update mytable
set FieldName = REPLACE(FieldName,'/','')
How to remove junk characters while reading a word document stored in 'OLE Object' field in an access database through C

How to remove junk characters while reading a word document stored in 'OLE Object' field in an access database through C


By : Dan Oprita
Date : March 29 2020, 07:55 AM
like below fixes the issue I found the solution for word documents (.doc files). OLE object storage in Ms Access contains some header information before actual data, so simply extracting the field contents as a byte array and saving it to disk does not work. Any OLE Object file has some standard signature. For word documents, OLEheaderLength is 85 bytes. So I strip 85 bytes from both ends of the byte array like-
code :
Con.Open();
string _query="select licenseDoc from Products where ID=56";
//Column licenseDoc contains word and text douments as OLE Objects
OleDbCommand Cmd = new OleDbCommand(_query, Con);

const int offset =85;
var oleBytes = (Byte[])Cmd.ExecuteScalar();
MemoryStream ms = new MemoryStream();
ms.Write(oleBytes, offset, oleBytes.Length - offset);

var file = Path.GetTempFileName();
using (var fileStream = File.OpenWrite(file))
{
  var buffer = ms.GetBuffer();
  fileStream.Write(buffer, 0, (int)ms.Length);
}
1] JPEG/JPG=224
2] BMP=78
3] PDF=85
4] SNP=74
5] DOC=85/90
6] DOCX=87
How to remove characters from end of field in MySql database

How to remove characters from end of field in MySql database


By : Tabdeeli Hum
Date : March 29 2020, 07:55 AM
I hope this helps . I don't have a mysql instance to test, but something like this would probably do it:
code :
UPDATE myTable
  SET myCol = TRIM(TRAILING '<br>' FROM myCol);
I need to remove some characters from a SQL field without altering database

I need to remove some characters from a SQL field without altering database


By : Amenajari Interioare
Date : March 29 2020, 07:55 AM
Any of those help I am using a database that was already created and I can access, but do not have the permission to alter the database at all. , You can remove the offending strings when printing the table:
code :
echo "<td>" . str_replace(array('%23', '%40', '%20"', 'q='), '', $row['query']) . "</td>";
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