A collation is a set of rules that determine how data is sorted and compared for comparing characters in a character set.

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How to change SQL Server collation

How could I change the SQL Server 2008 R2 Express Default Collation for the whole server and a particular database? Is there a way to do it using visual interface of SQL Server Management Studio? In ...
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4answers
680 views

What's up with the collation of some columns in sys.databases?

I'm attempting to run an UNPIVOT on various columns contained in sys.databases across various versions of SQL Server, ranging from 2005 to 2012. The UNPIVOT is failing with the following error ...
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Which collation should I choose for a muiti-language website?

Does a collation have any influence over a query speed? Does the size of a table change depending of the collation? If I want to build a website that must support all possible languages (lets take ...
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Moving from SQL 2005 [SQL_Latin1_General_CP1_CI_AS] to 2008 - will I lose any features by using 'backwards compatibility'

We're moving from SQL 2005 [Instance and DB have collation of SQL_Latin1_General_CP1_CI_AS] to SQL 2008 [which defaults to Latin1_General_CI_AS]. I completed a SQL 2008 R2 installation, and used ...
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SQL Server 2005/2008 UTF-8 Collation/Charset

I can't find option(s) directly to set UTF-8 rellated Collations/Charsets in SQL Server 2005/2008, same as is possible to set in another SQL engines, but in SQL Server 2005/2008 are there only Latin ...
10
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3answers
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How To Strip Hebrew Accent Marks

I need a Char Encoding Trick to Strip Hebrew Accent Marks. Sample Before בְּרֵאשִׁ֖ית בָּרָ֣א אֱלֹהִ֑ים אֵ֥ת הַשָּׁמַ֖יִם וְאֵ֥ת הָאָֽרֶץ Sample After בראשית ברא אלהים את השמים ואת הארץ
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Why would you index text_pattern_ops on a text column?

Today Seven Databases in Seven Weeks introduced me to per-operator indexes. You can index strings for pattern matching the previous queries by creating a text_pattern_ops operator class index, as ...
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Why are non-digits LIKE [0-9]?

My server's default collation is Latin1_General_CI_AS, as determined by this query: SELECT SERVERPROPERTY('Collation') AS Collation; I was surprised to discover that with this collation I can match ...
9
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3answers
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Treating certain Arabic characters as identical

In Arabic we have characters like ا (alef) and أ (alef with hamza). Users write them interchangeably and we want to search them interchangeably. SQL Server treats them as separate characters. How ...
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2answers
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How to choose a collation for international database?

I'm designing a database which will store data in different languages (using UTF-8), so I think the best way to display the queries results is ordering it according to the user's language during the ...
7
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2answers
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Automatic Translation when Converting Unicode to non-Unicode / NVARCHAR to VARCHAR

Unicode code point 9619 is a character called "Dark shade": ▓ (http://unicode-table.com/en/search/?q=9619). Using the SQL_Latin1_General_CP1_CI_AS collation and 1252 code page, I would expect that ...
7
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0answers
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Why is my PostgreSQL ORDER BY case-insensitive?

I have Postgres 9.4.4 running on Debian and I get the following ORDER BY behavior: veure_test=# show LC_COLLATE; lc_collate ------------- en_US.UTF-8 (1 row) veure_test=# SELECT ...
6
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4answers
1k views

Is there a collation to sort the following strings in the following order 1,2,3,6,10,10A,10B,11?

I have a database with a VARCHAR column that contains integers of varying length. I want to sort them so 10 comes after 9, not 1, and 70A comes after 70. I was able do this with PATINDEX(), a CTE, and ...
6
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1answer
6k views

How to determine the collation of a table in PostgreSQL?

I want to script a check of the collations used on my tables in PostgreSQL, but googling for Postgresql detect collation is not working well for me, and the documentation is not making this an easy ...
6
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1answer
175 views

How to find values with multiple consecutive upper case characters

For a project that I am working on, I need to identify values that have incorrect uppercase. For example, I need it to identify the following types of values: Mr JOHN Smith MR John Smith Mr John ...
6
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1answer
563 views

Dependant T-SQL comparison collation

Is there any way to set the collation for a string comparison based on an independent variable or column value? Something akin to SELECT COL1, col2 FROM [TABLE] WHERE COL3 LIKE '%string%' ...
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2answers
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Latin1_General_BIN performance impact when changing the database default collation

I have set the database collation to Latin1_General_BIN, to make string comparisons case-sensitive. Will this have an impact on performance? Will it have any impact on DML or DDL operations in the ...
5
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1answer
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sql_slovak_cp1250_ci_as vs Slovak_CI_AS

Can someone explain to me what is the difference between collation sql_slovak_cp1250_ci_as vs Slovak_CI_AS? I have a db set to sql_slovak_cp1250_ci_as and shared hosting supports only Slovak_CI_AS. ...
5
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1answer
311 views

SQL Server ; working around collation mismatches

Imagine the following scenario: I have two servers which are on two separate private networks. A linked server has been created, and there is a table in server A which has an updated version of the ...
5
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2answers
184 views

Is there a (non-binary) MySQL collation that doesn't treat different mathematical symbols as the same character?

I've run into a real headache with MySQL's collations and non-BMP characters (ones with Unicode codepoints above U+FFFF). Basically, given a table and data like: CREATE TABLE `math` ( `id` int(11) ...
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1answer
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MySQL: Illegal mix of collations

I've tried using a stored procedure to create indices, and got the following error: ERROR 1267 (HY000): Illegal mix of collations (utf8_general_ci,IMPLICIT) and ...
5
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1answer
340 views

SQL Server: TSQL or safe steps needed: Change collation en masse for group of tables

Looking for a safe TSQL (preferred) or safe steps (rather automated if possible) to change collation on dozens of tables in one throw. Background: We have a db, SQL Server 2005, with ~100 tables. ...
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1answer
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Storing Japanese characters in a table

I am using SQL Server 2008 R2 and I want to store Japanese characters in one of the columns of my table. Say I want to store Japanese names, how can I achieve that? Is there an easy way?
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Contained DB Collation error

When changing a database to partially contained I am getting the following error: Cannot resolve the collation conflict between "Latin1_General_CI_AS" and "Latin1_General_100_CI_AS_KS_WS_SC" in ...
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3answers
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SQL Server Collation for Arabic, Hebrew, English and French

I have new SQL Server database which need to have support in 3 different languages. What character sets and collations do I need to choose if I want my database to support the following: Hebrew ...
4
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1answer
129 views

How is encoding done in SQL database tables for pattern matching?

Are strings in table columns represented as bit patterns or Unicode? Does the database engine bring them into memory in a different representation character set from the disk-persisted ...
4
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1answer
424 views

How do I resolve Postgresql error, 'no collation was derived for column “foo” with collatable type citext'?

Just recently I upgraded from Postgresql 8.4.11 to 9.1.3. I used pg_dump in the process. Now I'm getting an error: ERROR: no collation was derived for column "vin" with collatable type citext ...
4
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1answer
144 views

PL/pgSQL - Indexes vs Collation vs Pattern Ops

I'm using PostgreSQL 9.3. Having already read articles and answers on DBA stackexchange: Why would you index text pattern ops on a text column PostgreSQL documentation: Indexes - Opclass Pattern ...
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2answers
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What's the meaning of the Collation Code (blank, 90, 100, 110) in SQL Server 2012

During the installation of SQL Server 2012, in the Collation tab, i can choose between French_CI_AS and French_100_CI_AS. What do they mean and which one is newer? When there's no Code, is it newer ...
3
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1answer
258 views

“String or binary data would be truncated” error copying nvarchar(10) to char(10)

I am inserting values from one SQL table / column into another. The datatypes are different for these columns due to other reasons but I do not understand why nvarchar(10) source and char(10) ...
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Installed SQL Server 2000 with wrong collation.. how to correct for entire server instance?

I installed SQL 2000 Developer (yes, old, don't ask) on my laptop ... with the wrong collation. Oops! It's showing Latin1_General_CI_AS, but it turns out I need to use SQL_Latin1_General_CP1_CI_AS ...
3
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2answers
361 views

How can I extract a lessequal char from SQL_Latin1_General_CP1_CI_AS?

When I create a table like this create table char_test( item varchar(10) collate SQL_Latin1_General_CP1_CI_AS ) go I can store varchars containing ≥ insert into char_test values ('≥'); When ...
3
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2answers
394 views

Cannot remove char 0x0000 from NVARCHAR column

So, I know all about the Replace function and a bug with char(0). I have a column (NVARCHAR(128)) that has some NCHAR(0x0000) characters from a bad import. I'm using SQL Server 2008 R2. The ...
3
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1answer
881 views

Dutch characters in DB2 problem

Ok, first of all, I have really limited knowledge about databases. Problem that I have is next: I inserted few rows with data that contains Dutch characters, such as names of different countries. ...
3
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1answer
413 views

Add a new collation to a Postgres database

I have these collations: postgres=# select * from pg_collation; collname | collnamespace | collowner | collencoding | collcollate | collctype ...
3
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2answers
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Using collate: When to use and when not to use

In one of my applications we had tsql like shown below SELECT DISTINCT [Dblist].[DbName] AS [DbName] FROM [Common].dbo.[Dblist] WHERE dbname not in ( SELECT [name] FROM ...
3
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1answer
8k views

Set value of character_set_client to utf8mb4

I'm trying to convert my DB to utf8mb4 by following this guide. I have set: [client] default-character-set = utf8mb4 [mysql] default-character-set = utf8mb4 [mysqld] init-connect='SET NAMES ...
3
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2answers
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Multiple charsets and Collations for a Multinational Database

After decades of business speaking with companies that adhere to the general Latin1 Collation, my company is facing the issue of storing information in a different charset and collation: Greek. So, ...
3
votes
1answer
843 views

What is the impact of LC_CTYPE on a PostgreSQL database?

So, I've few Debian servers with PostgreSQL on it. Historically, those servers and PostgreSQL are localized with the Latin 9 charset and back then it was fine. Now we have to handle things like ...
3
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1answer
827 views

Casesensitive vs. Caseinsensitive Collatesequences?

I just started working with the SQLite database places.sqlite. Fact is that this database uses case sensitive collate sequences making writing queries as funny as in Oracle. I want to know, are ...
3
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0answers
25 views

Azure SQL DB migration from Visual Studio raises collation error

I want to run a migration in my Azure hosted database. The migration works perfect in several local machines. When I try targeting the Azure database it raises the following exception: Column X is ...
3
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0answers
286 views

utf8mb4 in SQL Server Express

We have some web applications based on databases using utf8mb4 as character set and utf8mb4_Standard as collation. We saw that we can use any character we want with this setting. In SQL Server ...
2
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1answer
735 views

How to disable case sensitivity in SQL Server 2012?

I tried to update collation_name in sys.databases. I am trying to change 'SQL_Latin1_General_CP1_CS_AS' to 'SQL_Latin1_General_CP1_CI_AS' in order to disable case sensitivity in table. update d set ...
2
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1answer
129 views

What collation to use for Ukraine?

We have an accounting program with an SQL Server database and would like to start a Ukrainian version. I am not sure which collation to use: Ukrainian or Cyrillic_General? With a non-technical ...
2
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1answer
130 views

Why does MS SQL Server return a result for empty string check when Unicode string is not empty

select * from (select N'ግዜ ' as t) as t2 where t= '' the string 'ግዜ ' matches the above check, why is this?
2
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1answer
126 views

Was using `set datcollate='C'` a mistake?

In a pre-production environment running django 1.6 on PostgreSQL 9.1 we had a problem with database records arriving in a different order from what the application was expecting. So we ran this ...
2
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1answer
62 views

PosgtreSQL - Change multiple fields collation in one query

I have small database with few text fields with "default" collation. I don't want to recreate database. What is the query to alter all problematic fields at once? To change the single one I can use ...
2
votes
1answer
167 views

Why cp1256 collation is not 1 byte in MySQL?

I've read an article that cp1256 collation takes 1 byte for Arabic characters, but when I created an index on the column that was cp1256 with type of varchar(900), only 767 characters picked up for ...
2
votes
2answers
6k views

SQL Server 2008 collation arabic

We are currently having a problem loading arabic into a SQL Server 2008 database. We want to load بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ but in the database it changes to بِسْمِ اللَّهِ ...
2
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1answer
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What is Collation Compatibility_60_406_30001 in SQL Server

We have an SQL Server 2014 (recently upgraded from 2008 R2) instance where one of the databases has some strange settings for collation: In the Properties window for the database we have the ...