Question: How to use a parameter in a SQL "like" statement?

How to use a parameter in a SQL “like” statement? I think I am losing it but I can’t figure this out.

request.input('param1', sql.VarChar, req.body.search);

var query = "SELECT * FROM table WHERE name LIKE '%@param1'";

Query statement above will not evaluate the @param1 when run.

Ideas?

[kristofferostlund]

The query should be something like the following:

// I highly recommend using backticks (`), or at least doble quoation marks for the query strings (")
const query = `SELECT * FROM [dbo].[Users] WHERE [Name] LIKE '%' + @nameSuffix`

// or similar as to how m-adil writes his
const otherQuery = 'SELECT * FROM [dbo].[Users] WHERE [Name] LIKE \'%\' + @nameSuffix + \'%\''

Do note that the query variable should be a single javascript string.

Basically, in plain T-SQL code, the LIKE statement is a SQL-string, but since we’re using a variable we’ll have to concat the initial dollar sign ('%') with the variable @nameSuffix. This is true also for our T-SQL in JavaScript code as well, but we’ll have to be cautious with how we declare the JavaScript string.

---

Here’s a full example for selecting all users with a name that ends on son (Olsson, Anderson, etc):

const request = new sql.Request()

request.input('nameSuffix', sql.VarChar, 'son')

const query = `SELECT * FROM [dbo].[Users] WHERE [Name] LIKE '%' + @nameSuffix`

request.query(query)
  .then(value => console.log(value))
  .catch(error => console.log(error))

[acentfrio]

We need working example. Can’t figure out how to make this work =/