Update #4455, Regenerate all commands' docs (#4557)

docs/commands/where.md

@@ -14,3 +14,25 @@ Filter values based on a condition.
 
  -  `cond`: condition
 
+## Examples
+
+List all files in the current directory with sizes greater than 2kb
+```shell
+> ls | where size > 2kb
+```
+
+List only the files in the current directory
+```shell
+> ls | where type == file
+```
+
+List all files with names that contain "Car"
+```shell
+> ls | where name =~ "Car"
+```
+
+List all files that were modified in the last two weeks
+```shell
+> ls | where modified <= 2wk
+```
+