Questions tagged [collation]
A collation is a set of rules that determine how data is sorted and compared for comparing characters in a character set.
1
vote
2answers
13 views
PostgreSQL: difference between collations 'C' and 'C.UTF-8'
In PostgreSQL, what is the difference between collations C and C.UTF-8?
Both show up in rows of pg_collation. Is it perhaps the case that C.UTF-8 is the same as C with encoding UTF-8 regardless or ...
1
vote
2answers
35 views
MySQL and MariaDB: COLLATE on table vs COLLATE on all columns?
Will the following table behave or perform any differently
CREATE TABLE t1 (
foo char(60) COLLATE utf8_bin,
bar char(64) COLLATE utf8_bin,
baz char(80) COLLATE utf8_bin
) DEFAULT CHARSET=utf8;
...
1
vote
2answers
31 views
Change default collation for character set utf8mb4 to utf8mb4_unicode_ci
When creating a database without specifying a character set or collation the servers defaults are used (as expected).
MariaDB [(none)]> SHOW VARIABLES LIKE '%_server' ;
+----------------------+----...
1
vote
2answers
60 views
SQL Server default collation vs database with different collation - potential problems?
I'm struggling with the design of new database that has to use a different collation (Y Collation) than the SQL Server Instance default collation (X Collation). I'm looking for potential problems.
...
1
vote
1answer
30 views
MySQL Case Sensitive Join on Varchar
I have two tables, both with identical data types, character sets, and collation explicitly specified.
CLERK CHAR(3) CHARACTER SET latin1 COLLATE latin1_bin NULL
For a case-sensitive join on the ...
2
votes
1answer
43 views
Error: 468 trying to connect to SQL server with SQL Server management studio
I'm trying to connect to SQL Server 12 with SQL Server management studio 2014.
The connection is succesful, but when I try to see properties of a specific database with mouse right button I get this ...
0
votes
0answers
14 views
After upgrading from PG 9.3 to 10 indices became corrupted
So recently I was upgrading the database in production from Postgres 9.3 to 10. In addition to upgrade, we wanted to move the database to another machine. I know, doing it "in place" would be easier ...
4
votes
3answers
110 views
Sql server 2016 Change only server and without all databases [duplicate]
How can i change server collation without changing whole databases, because i have
many databases which aren't belong to me, so i want change server collation and my database only.
SQL Server ...
0
votes
0answers
119 views
Setting utf8mb4_unicode_ci as the default for all utf8mb4 character set tables
I am running MySQL 5.7.19 in RDS and recently went through a conversion of everything to Character Set = UTF8MB4 and Collation = UTF8MB4_unicode_ci. I set the following parameter group settings and ...
1
vote
1answer
43 views
Why doesn't MySQL coerce the collation to the column-specified, when comparing to a literal?
I have a table with a collation defined on a column:
CREATE TEMPORARY TABLE test_table (
utf8_col VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_bin
);
INSERT INTO test_table VALUES('ã');
According ...
6
votes
1answer
105 views
SQL Server 2016 Collation and Internal table Glitch?
My Steps:
installed SQL 2016 with collation SQL_Latin1_General_CP850_CI_AS
Restored Database to Stage instances with same collation as Database.(original Backup from 2012)
Ran > "C:\Program Files\...
6
votes
2answers
613 views
Process to change collation on a database
I've been asked to change the collation on a database that has been in production for a few years as it was not set correctly at the time of deployment.
So my research shows that in order change ...
2
votes
1answer
126 views
Implications of changing SQL Server collation
We are currently using SQL Server 2016 and currently the collation set on our database is SQL_Latin1_General_CP1_CI_AS. Our Analaysis services' collation is set to SQL_Latin1_General_CP1_CS_AS.
The ...
1
vote
2answers
44 views
Using CONVERT TO CHARACTER SET for changing only collation?
I think the answer to this is an obvious yes, but I'm having trouble finding confirmation on it. All the questions related to charsets seems to be about changing the charset and not only collations.
...
3
votes
2answers
321 views
SSMS - How to do case-insensitive searches in Object Explorer
Preface: I am not referring to queries.
There are numerous places in SSMS that allow for filtering, such as the Object Explorer and Profiler, but these all treat filters as case-sensitive with no ...
2
votes
2answers
198 views
Database Collation problem when comparing two databases
I have changed the collation of test database using the follwoing query:
USE master;
GO
ALTER DATABASE test
COLLATE SQL_Latin1_General_CP1_CI_AI ;
GO
--Verify the collation setting.
...
0
votes
1answer
275 views
setting a default collation for a postgresql database
I have created a database with Turkish collation.
createdb -l tr_TR test_tr -E LATIN5 -T template0
Then a table with a row.
\c test_tr
create table turkish(one text);
insert into turkish values(...
1
vote
1answer
48 views
MySQL not using indexes
My query does not seem to bother for using indexes.
Collations are the same on each table.
EXPLAIN SELECT SUM(it.revenue) FROM invoice_items AS it
INNER JOIN invoice AS i ON i.id = it.invoice_id
...
0
votes
0answers
85 views
Resolving “there is unknown charset/collation names” warnings on views
I recently moved our MySQL 5.6 server over to MariaDB 10.3.10 and, for the most part, have not had any problems. We have a couple of databases that have close to 1000 views which are now filling the ...
1
vote
2answers
67 views
SQL Server Execution Plan on server level
Case: I have application which is doing search from database. That is going very slowly (more than 40 seconds). With trace I caught a query. When I run query in SSMS, it takes 2-3 seconds, but when I ...
2
votes
2answers
330 views
How to join global temp tables in SQL Server?
I have four global temp tables (##A,##B,##C,##D) on which I want to perform a left join in SQL Server 2008. By global temp tables I mean I created them using a code like this:
SELECT *
INTO ##A
...
3
votes
2answers
1k views
SQL Server 2019 UTF-8 Support Benefits
I'm already quite comfortable with using COMPRESS() and DECOMPRESS() in an internal forum software for our company (Currently in SQL Server 2017), but trying to make the database as efficient as ...
6
votes
2answers
68 views
VARCHAR memory buffer appears to be breaking in ChineseTaiwan Collation
It is difficult for me to write something in English. I hope you understand.
I used a translator and reviewed it.
I created two temporary databases. The collations are 'Korea_Wansung_CI_AS' and '...
4
votes
1answer
805 views
What are the rules for using COLLATE in a query?
I am putting a script together, that gives me the permissions on database objects.
SELECT permission_order=710
,permission_type = 'Object Level Permissions'
,db = db_name(),
login_=...
1
vote
1answer
136 views
SSIS Data Flow Task Violates Unique Constraint But Linked Server Insert Succeeds
Ultimately, what I am trying to do is create an SSIS package in the QA environment for another team which truncates the destination tables and inserts from the source tables. However, on one table, ...
1
vote
1answer
256 views
Are utf8_bin and utf8_general_cs the same?
Here's the situation:
I have come across several posts for "utf8_bin vs utf8_general_ci".
Similarly, "utf8_general_cs vs utf8_general_ci".
But I can't find a post for "utf8_bin vs utf8_general_cs". ...
3
votes
2answers
84 views
Making collations uniform across multiple SQL Server 2008 databases [closed]
I have been assigned to try and make collations uniform across databases. Currently, it's a mess, different collations everywhere.
This is mostly solved by using collate database default in queries ...
3
votes
2answers
229 views
index not being used due to different collations - is there any work around?
I am running the following query:
SET ROWCOUNT 50
SELECT UL.*
FROM COLA.dbo.tbl_UserLogin ul
INNER JOIN CABrochure.dbo.tbl_country co
ON ul....
2
votes
0answers
660 views
Use LIKE in column with arabic
I have a SQL Server 2012 DB with a column that includes Arabic text. The column is nvarchar(MAX) with collation Arabic_CI_AI_KS_WS. To test if LIKE searches are working I copied some of the text ...
1
vote
2answers
389 views
Wrong sort order using utf8_unicode_ci and swedish characters like ö
I am confused about what encoding and collation I should use so my queries returns the correct sort order.
Right now my encoding is UTF-8 Unicode and collation utf8_unicode_ci for both firstname and ...
0
votes
1answer
37 views
Code not working due to collation?
Let me preface my question by saying, that my teacher stared at my code for 2h and could only guess that it might be the collation.
Here's the problem: for an exercise we were asked to create a movie ...
2
votes
3answers
137 views
Why does using Format vs Right to apply padding cause estimated number of rows to dramatically change?
I was working on a query at work, that had a left join like
cast(cola as varchar) + '-' + right('000' + cast(colb as varchar), 3) = x
The actual execution plan for this query was fairly close, est ...
1
vote
2answers
4k views
Cannot resolve the collation conflict between “SQL_Latin1_General_CP1_CI_AS” and “Latin1_General_CI_AI”
We recently started getting the following error while executing a stored procedure:
System.Data.SqlClient.SqlException (0x80131904): **Cannot resolve the collation conflict between "...
4
votes
1answer
3k views
Why do I get incorrect characters when decoding a Base64 string to NVARCHAR in SQL Server?
I've been looking at how to decode Base64 with SQL Server and after searching around many solutions online (some from here) seem to be based upon this sort of method.
SELECT CAST(CAST('...
2
votes
1answer
81 views
SQL Server 2008R2 database migration to cloud: case-insensitive collation changed to case-sensitive
Recently felt the fall out (crappy legacy code base) of a database migration by a third party vendor where the collation was swapped from case-insensitive to case-sensitive. I am wondering if the ...
6
votes
1answer
313 views
Why do two identical strings have a different length but the same binary value?
I am trying to return a distinct set of department names from a table - nothing special. However, when using the following query duplicates are displayed:
select distinct department_name
from ...
0
votes
1answer
84 views
What is the MySQL equivalent of Postgres' C collation?
I'm working on reimplementing a Postgres schema in MySQL, and one of the things I can't seem to find a clear equivalent for is Postgres' "C" collation.
id TEXT COLLATE "C" NOT NULL
What would be the ...
5
votes
3answers
15k views
How to do a case-insensitive LIKE in a case-sensitive database?
My vendor requires the data warehouse database to be case sensitive, but I need to do case-insensitive queries against it.
In a case-sensitive database, how would you write this to be case-...
4
votes
1answer
146 views
Why isn't Unicode character REPLACEd in some cases?
Running this results in "test", as expected:
SELECT
REPLACE(NCHAR(1234), NCHAR(1234), N'test');
However, running this results in "aӒa", which doesn't have "test" in it:
SELECT
REPLACE(N'a' +...
3
votes
1answer
3k views
inserting a special character into a table
I have a few characters that are being replaced by a ?. How do you keep the original character in the table? The character that I am trying to insert is a ɬ; Latin Small Letter L With Belt. Is it ...
11
votes
1answer
190 views
N'Șc' considered duplicate key of N'C' using Latin1_General_CI_AS collation
I have a table with a unique key that includes an NVARCHAR(50) column (correct or not, but is there). So, when trying to insert Șc or C (doesn't matter the order of the insert) it breaks on the 2nd ...
2
votes
2answers
2k views
Character Conversion Issue Importing From CSV File
After doing a load of CSV files, there are various words that are "written" to the database incorrectly.
Some examples:
Diã¡ria should be Diária
Crã©dito should be Crédito
Ligaã§ãµes should be ...
5
votes
2answers
2k views
SQL Server Bulk Insert properly interprets some Unicode characters but not others?
For some reason the MS SQL Server 2016 bulk insert misinterprets/translates Unicode characters:
C9 (É) into 2B (+)
A1 (¡) into ED (í)
A0 ( ) into E1 (á)
AE (®) into AB («)
CB (Ë) into 2D (-)
D1 (...
2
votes
1answer
173 views
Changing Collation with a High Availability server
How do I change a DB Collation without removing the DB from high availability group? Can I just take it offline and change it? or I really do need to take it out of high availability group 1st then ...
19
votes
2answers
409 views
Accent Sensitive Sort
Why do these two SELECT statements result in a different sort order?
USE tempdb;
CREATE TABLE dbo.OddSort
(
id INT IDENTITY(1,1) PRIMARY KEY
, col1 NVARCHAR(2)
, col2 NVARCHAR(2)
);
GO
...
2
votes
0answers
54 views
Writing data to new database - collation question [duplicate]
We will be changing the collation of our databases in a few months. I am setting up an environment, to test the new collation with my application. I have created a database with our new collation and ...
4
votes
2answers
337 views
Error while copying data over linked server
I am trying to copy the contents of 1 table from one database to another over a linked server.
I am using the following query to do so
insert into [Schema].[Table] select * from [Server].[Database]...
4
votes
1answer
478 views
Collate issues with wrong characters
Well, the problem is well known, but I'm looking for a smarter solution if there's one.
For some reason the system doesn't recognize some characters and I can't compare the columns
Here is an ...
1
vote
1answer
928 views
Postgres collate example in select?
I would like to comprehend the different behavior of like and =. Sadly, I can not reproduce the following simple example thus that both queries return a different result:
SELECT 'ä' LIKE 'ae' COLLATE ...
3
votes
1answer
451 views
Does PostgreSQL support ICU collation's options and settings?
ICU Specifies different LDML Collation Settings. Some of them seem pretty interesting, especially the ones on case and accent,
“Ignore accents”: strength=primary
“Ignore accents” but take case ...
