Update using replace in sql

Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. I've got a table with two columns, ID and Value.

I want to change a part of some strings in the second column. When I execute the script SQL Server does not report an error, but it does not update anything either. Why is that? If the column to replace is type text or ntext you need to cast it to nvarchar. To make the query run faster in big tables where not every line needs to be updated, you can also choose to only update rows that will be modified:. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 8 years, 6 months ago. Active 11 months ago. Viewed 1. Improve this question. Beth 9, 1 1 gold badge 20 20 silver badges 40 40 bronze badges. It does not replace anything because the wildcards are not treated as wildcards but rather as literals.

Add a comment. Active Oldest Votes. Improve this answer. Mauricio Gracia Gutierrez 8, 4 4 gold badges 55 55 silver badges 82 82 bronze badges. Jon Egerton Jon Egerton It work grate, but not with ntext type This was helpful — Stanley Okpala Nwosa. This will not work if your Column type is Text or NText, see this answer stackoverflow. However, in SQL, you will work with tables and databases. A real-world example can be managing the Customers' table of global clients. Thus, the mistakes in all the fields were quickly taken care of with a single line of command with the use of replace in SQL.

However, this was a small table. But while working with large tables where the number of affected rows is more, it is essential to check if the function executes as expected. Now that you know it works as expected, you can apply it to the entire table by removing the WHERE clause.

If instead of using it as a string expression, you remove the inverted commas and give it as a column. Then it will work as expected. In this article, you have learned everything you need to know about replace in SQL. The SQL replace function comes in handy to easily and quickly change any particular data from vast and enormous databases and tables.

Using replace in SQL is a fundamental concept that is essential to manage databases efficiently. However, besides such basic concepts, it is also essential to learn about and use all the advanced SQL concepts too.

The training is adept at helping you excel in writing SQL queries. Leave them in the comments section, and our experts will get back to you on the same, ASAP. What is Angular? Best Programming Languages to Learn in Article.