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base repository: VividCortex/go-database-sql-tutorial
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head repository: liyuankui/go-database-sql-tutorial
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compare: patch-1
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Commits on Jun 5, 2018

  1. Add a trick to handle null sql query results

    @liyuankui
    liyuankui authored Jun 5, 2018

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  1. +16 −0 nulls.md
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@@ -53,6 +53,22 @@ for rows.Next() {
}
</pre>

Another trick to handle NULLs without using nullable types.

Use pointers.

<pre class="prettyprint lang-go">
for rows.Next() {
var s *string
err := rows.Scan(&amp;s)
// check err
if s != nil {
// use s.String
} else {
// NULL value
}
}
</pre>

**Previous: [Handling Errors](errors.html)**
**Next: [Working with Unknown Columns](varcols.html)**