Add Change The Current Directory For psql as a postgres til

README.md

@@ -7,7 +7,7 @@ variety of languages and technologies. These are things that don't really
 warrant a full blog post. These are mostly things I learn by pairing with
 smart people at [Hashrocket](http://hashrocket.com/).
 
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+_406 TILs and counting..._
 
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@@ -172,6 +172,7 @@ _405 TILs and counting..._
 - [Adding Composite Uniqueness Constraints](postgres/adding-composite-uniqueness-constraints.md)
 - [Aggregate A Column Into An Array](postgres/aggregate-a-column-into-an-array.md)
 - [Auto Expanded Display](postgres/auto-expanded-display.md)
+- [Change The Current Directory For psql](postgres/change-the-current-directory-for-psql.md)
 - [Checking The Type Of A Value](postgres/checking-the-type-of-a-value.md)
 - [Clear The Screen In psql](postgres/clear-the-screen-in-psql.md)
 - [Clear The Screen In psql (2)](postgres/clear-the-screen-in-psql-2.md)

postgres/change-the-current-directory-for-psql.md

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+# Change The Current Directory For psql
+
+When you start a `psql` session, your current directory is what `psql` will
+use as its current directory. This is important for meta-commands that use
+relative paths based on the current directory -- for instance, the `\i`
+meta-command for importing files.
+
+You can change the current directory within a `psql` session using the `\cd`
+meta-command.
+
+If my current directory is `home` and there is a `sql` directory in `home,
+these commands will do the following:
+
+```sql
+\! pwd
+/home
+\cd sql
+\! pwd
+/home/sql
+```
+
+The `\cd` meta-command even supports tab completion relative to the current
+directory.
+
+You can also change to your home directory using just `\cd`.