How to Concatenate Strings and Values in SQL Queries in Go?

Equivalent SQL Query Concatenation in Go

In Python, the concatenation of strings and values in an SQL query is straightforward using the % operator. However, in Go, this method may not work as expected.

To resolve this issue, Go programmers can utilize the fmt.Sprintf function. The following code sample demonstrates the correct way to concatenate strings and values:

<code class="go">query := fmt.Sprintf(`SELECT columnA FROM tableA WHERE columnB = %d AND columnB = %s`, SomeNumber, SomeString)</code>

This method ensures that values are correctly formatted and handled. Additionally, it's crucial to note the potential vulnerability of injection attacks when embedding user-provided data in queries. To mitigate this risk, consider using the following approach:

<code class="go">query := `SELECT column_name FROM table_name
    WHERE column1_name = %d AND column2_name = %d`

rows, err := db.Query(query, Val1, Val2)</code>

By employing separate arguments for the query and values, you can prevent malicious input from altering the structure or intent of your query.

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