I need a SQL query to make all data in a column UPPER CASE?
Any ideas?
Permanent:
UPDATE
MyTable
SET
MyColumn = UPPER(MyColumn)
Temporary:
SELECT
UPPER(MyColumn) AS MyColumn
FROM
MyTable
If you want to only update on rows that are not currently uppercase (instead of all rows), you'd need to identify the difference using COLLATE
like this:
UPDATE MyTable
SET MyColumn = UPPER(MyColumn)
WHERE MyColumn != UPPER(MyColumn) COLLATE Latin1_General_CS_AS
Cases sensitivity is based on your collation settings, and is typically case insensitive by default.
Collation can be set at the Server, Database, Column, or Query Level:
-- Server
SELECT SERVERPROPERTY('COLLATION')
-- Database
SELECT name, collation_name FROM sys.databases
-- Column
SELECT COLUMN_NAME, COLLATION_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE CHARACTER_SET_NAME IS NOT NULL
Collation Names specify how a string should be encoded and read, for example:
Latin1_General_ _AS
→ Case Insensitive _AS →Case Insensitive Latin1_General_ _AS
→ Case Sensitive _AS →区分大小写
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