The **append** command runs a subsearch and appends its results to the end of the existing results.
This is useful when you want to look at two different data sets that don't share a common field.
Note: `append` limits subsearch results to 50,000 rows. Use `appendpipe` to append results of a subpipeline to the main results without hitting the limit in some cases.
index=sales sourcetype=eu_sales
| append [ search index=sales sourcetype=us_sales ]