Add Explore The Database Schema as a SQLite TIL

sqlite/explore-the-database-schema.md

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+# Explore The Database Schema
+
+The first thing I like to do when connecting to a database is get a quick lay
+of the land. What are the tables and what do they look like?
+
+I can list all tables with the `.tables` dot-command.
+
+```sql
+sqlite> .tables
+ingredient_amounts  ingredients         recipes
+```
+
+I can then look at the `create table` statement for specific tables to see what
+their schema looks like:
+
+```sql
+sqlite> .schema recipes
+CREATE TABLE recipes (
+  id integer primary key,
+  name varchar not null,
+  description text not null,
+  instructions text not null
+);
+```
+
+The `.schema` dot-command can also be used without any argument and it will
+display the schema for all tables of all connected databases.
+
+Run `.help` from the `sqlite3` prompt for more dot-command options.
+
+[source](https://www.sqlite.org/cli.html#querying_the_database_schema)