How to Convert UTF8 Text to ISO 8859-1 in SQL Server?

Convert Text Value in SQL Server from UTF8 to ISO 8859-1

In SQL Server, text data can be stored in various encodings, including UTF8 and ISO 8859-1. This article addresses the need to convert text from UTF8 encoding to ISO 8859-1, a common challenge when dealing with character sets.

To successfully convert the text, follow these steps:

1. Determine the current encoding of the text column by examining the column's connection or database settings.
2. Write a SQL query to manipulate the text data. This query can include functions or procedures that facilitate the conversion process.
3. Test the query to verify that it correctly converts the text.

To illustrate the conversion process, consider the following scenario:

A SQL Server table has a column named "text_data" that contains UTF8-encoded text. The task is to convert this text to ISO 8859-1 encoding.

The following query can be used to achieve this:

-- Create a temporary table with UTF8-encoded text
CREATE TABLE #temp_table (text_data varchar(max) COLLATE Latin1_General_BIN);
-- Insert UTF8-encoded text into the temporary table
INSERT INTO #temp_table (text_data) VALUES ('Olá. Gostei do jogo. Quando "baixei" até achei que não iria curtir muito');
-- Convert the text to ISO 8859-1 encoding
UPDATE #temp_table SET text_data = CONVERT(varchar(max), text_data, 1252);
-- Select and display the converted text
SELECT text_data FROM #temp_table;
-- Drop the temporary table
DROP TABLE #temp_table;

By executing this query, the text in the "text_data" column will be converted from UTF8 to ISO 8859-1 encoding, and the converted text will be displayed.

Remember, when working with character sets and encodings, it is crucial to consider the compatibility of the encoding with other systems or applications where the data may be used or exchanged.

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