How to search hexadecimal characters from a SQL Server table? Actually I tried like below but it is searching all zeroes in the field.
select Email,*
from address
where CHARINDEX(convert(varchar, Ascii(0x00)), Email) > 0
Thanks
I had a similar problem where a hexadecimal character was crashing a query. This is what I did to find it.
select Email
from address
where Email like '%' + CHAR(0x00) +'%'
Now to stop the bad data getting in in the first place...
Related
I got a database with a user table. This table contains a column phonenumber. The problem is that its fields use multiple number patterns.
The current patterns I found:
06403/975-0
+496403975 0
06403 975-0
06403 975 0
+49 6403 975 0
When searching for a user in the database, is there a way to search for all number patterns?
SELECT id FROM user WHERE phone = '0123456789'
I use Oracle and MS SQL
Assuming your question means this:
"Is it possible to remove all the non-digit characters from the stored phone number, before making the comparison in the WHERE clause?"
a possible solution looks like this:
...
where translate(phone, '0123456789' || phone, '0123456789') = <input value here>
TRANSLATE will translate every digit to itself, and all other characters in phone to nothing (they will simply be deleted from the string). This is exactly what you want.
If you find that the query is slow, you may want to create a (function-based) index on translate(phone, '0123456789' || phone, '0123456789').
EDIT: I missed the part where you said you are using both Oracle and SQL Server. I did a quick search and found that SQL Server does not have a function similar to Oracle's TRANSLATE. I will leave it to SQL Server experts to help you with that part; I don't know SQL Server.
In Oracle you could do it like this. Strip out the non-numeric characters with translate() to get the phone number. You need to handle the leading zero or international dialling code:
select username from your_table
where translate(phone, '1234567890+/ -', '1234567890') in ('064039750', '4964039750')
You may need to tweak this if you don't know what the international dialling code is.
Obviously the actual problem is one of data quality: the application should enforce a strict format on phone numbers. One bout of data cleansing on write saves a whole bunch of grief on read.
You have a database containing phone numbers. These are sometimes in international format, but often in some national format, probably German, where two leading zeros introduce a country code, while a single leading zero would introduce an area code instead (assuming the home country Germany then). Moreover, a phone number can contain symbols for readability, namely '-', '/', and ' '.
So
+49 12/3456-7 means +491234567 of course
00441234567 means +441234567
04412345 means +494412345
I suggest you convert all numbers into international format in these steps:
replace a leading + with a leading 00, thus making only digits important
remove every character that is not a digit
replace a leading 00 with a leading +
replace a leading 0 with a leading +49
Use Oracle's REGEXP_REPLACE for this:
select
regexp_replace(
regexp_replace(
regexp_replace(
regexp_replace(trim(phone),
'^\+', '00'), -- leading '+' -> leading '00'
'[^[:digit:]]', ''), -- remove all non-digits
'^00' , '+'), -- leading '00' -> leading '+'
'^0', '+49') -- leading '0' -> leading '+49'
as international_phone
from mytable;
You can do this in the WHERE clause of course:
SELECT id FROM user WHERE regexp_replace(...) = '+49123456789'
or even
SELECT id FROM user WHERE regexp_replace(...phone...) = regexp_replace(...'0123456789'...)
And you may write a PL/SQL function for this for convenience and use it so:
SELECT id FROM user WHERE international_phone(phone) = international_phone('0123456789')
This is for Oracle. There may be something alike for SQL Server.
Do you know how to remove below kind of Characters at once on a query ?
Note : .I'm retrieving this data from the Access app and put only the valid data into the SQL.
select DISTINCT ltrim(rtrim(a.Company)) from [Legacy].[dbo].[Attorney] as a
This column is company name column.I need to keep string characters only.But I need to remove numbers only rows,numbers and characters rows,NULL,Empty and all other +,-.
Based on your extremely vague "rules" I am going to make a guess.
Maybe something like this will be somewhere close.
select DISTINCT ltrim(rtrim(a.Company))
from [Legacy].[dbo].[Attorney] as a
where LEN(ltrim(rtrim(a.Company))) > 1
and IsNumeric(a.Company) = 0
This will exclude entries that are not at least 2 characters and can't be converted to a number.
This should select the rows you want to delete:
where company not like '%[a-zA-Z]%' and -- has at least one vowel
company like '%[^ a-zA-Z0-9.&]%' -- has a not-allowed character
The list of allowed characters in the second expression may not be complete.
If this works, then you can easily adapt it for a delete statement.
Text = “World“ world ” <world <Word> ‘ word’ ‘ word“ word’ =1254.25 = 2545.58. 20%
Hey guys,
I need to search a word from a string which was saved in my db. The searching word contains special characters such as ""'!##$%^<>. Below is the sql select query used for the search.
select * from TABLE where TABLE.text like ('%'+ '“ World' +'%')
as a result some of the special character are not searched. Characters such as double quotation, single quotation are not searched from this. need assistance with solving this problem asap. thank you :)
These Special characters are Unicode characters, When ever dealing with these characters in sql server you have to tell sql server explicitly that there can be some unicode characters in the strings you are about to manipulate by prefixing your strings with N'String'
In your case you would write a query something like ....
select * from TABLE
where TABLE.text like N'%'+ N'“ World' + N'%'
you can use the ESCAPE clause and escape your parameter value. http://technet.microsoft.com/en-us/library/ms179859.aspx
so for example to search for a string containing the character %
select * from TABLE where TABLE.text like ('%'+ N'\%' +'%') ESCAPE '\'
I want to be able to differentiate between a string that is alphnumeric and a string that is in hex format.
My current query is:
<columnName> LIKE '?_____=' + REPLICATE('[0-9A-Fa-f]',16)
I found this method of searching for hex ID's online and I thought it was working. However after getting a significantly larger sample size I can see a high false positive rate in my results. The problem is that this gives me all the results I do want but it also gives me a bunch of results I dont care about. For example:
I want to see:
<url>.php?mains=d7ad916d1c0396ff
but i dont want to see:
<url>.php?mblID=2007012422060265
The difference between the 2 strings is that the 16 characters at the end that i want to collect are all numeric and not a hex ID. What are some ways you guys use to limit the results to hex ID only? Thanks in advnace.
UPDATE:
Juergen brought up a good point, the second number could be a hex value to. Not all hex numbers contain [a-F]. I would like to rephrase the question to state that I am looking for an ID with both letters and numbers in it, not just numbers.
The simplest way is just to add a separate clause for that restriction:
<columnName> LIKE '?_____=' + REPLICATE('[0-9A-Fa-f]',16)
AND <columnName> NOT LIKE '?_____=' + REPLICATE('[0-9]',16)
It should be fairly simple to determine if a string contains only numbers...
Setting up a test table:
CREATE TABLE #Temp (Data char(32) not null)
INSERT #Temp
values ('<url>.php?mains=d7ad916d1c0396ff')
,('<url>.php?mblID=2007012422060265 ')
Write a query:
SELECT
right(Data, 16) StringToCheck
,isnumeric(right(Data, 16)) IsNumeric
from #Temp
Get results:
StringToCheck IsNumeric
d7ad916d1c0396ff 0
2007012422060265 1
So, if the IsNumeric function returns 0, it could be a hex string.
This makes several assumptions:
The rightmost 16 characters are what you want to check
You only ever hit 16 characters. I don't know when the string would get too long to check.
A non-numeric character means hex. Any chance of "Q" or "~" being embedded in the string?
How can I seach for a special character like "→" (0x1A)?
An example for my query is:
select * from Data where Name like '%→%'
I want to use instead of "→" something like 0x1A.
I can't use any Java or C# Code. I just have SQuirrel to connect and send commands to the database.
You can use chr() to search the charater:
select * from data where name like '%' + chr(26) + '%'
Old topic, but a current issue nevertheless. My DB2 environment runs on AS400/iSeries and use EBCDIC instead of ASCII. I worked out the character from the EBCDIC table at lookuptables.com.
ASCII 0x1a translates to SUB, and SUB translates to EBCDIC 0x3f.
Using that in SQL looks like this:
select productDescription
from productsTable
where productDescription like '%' || x'3F' || '%'`
Solution 1: Use chr(26).
Solution 2: Write the query in Java or another programming language which lets you build the SQL from pieces and where you can enter hex codes.
This query has worked for me in the past on iSeries DB2.
select * from db/table where posstr(field, x'3F') > 0
Trouble is you have to be certain of the hex value you are searching for in the string. I had a similar situation where the I was sure the hex code for the character was x'3F, but when I sub-string the non-viewable character it was actually x'22. You might want to single out the character that is giving you the issue and see what it's value is.
select hex(substr(field, 21,1)) from db/table where posstr(field, 'StringBeforeCharacter') > 0