Add Create A Table From The Structure Of Another as a Postgres TIL

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1200 TILs and counting..._
+_1201 TILs and counting..._
 
 ---
 
@@ -566,6 +566,7 @@ _1200 TILs and counting..._
 - [Count Records By Type](postgres/count-records-by-type.md)
 - [Count The Number Of Trues In An Aggregate Query](postgres/count-the-number-of-trues-in-an-aggregate-query.md)
 - [Create A Composite Primary Key](postgres/create-a-composite-primary-key.md)
+- [Create A Table From The Structure Of Another](postgres/create-a-table-from-the-structure-of-another.md)
 - [Create An Index Without Locking The Table](postgres/create-an-index-without-locking-the-table.md)
 - [Create Database Uses Template1](postgres/create-database-uses-template1.md)
 - [Create hstore From Two Arrays](postgres/create-hstore-from-two-arrays.md)

postgres/create-a-table-from-the-structure-of-another.md

@@ -0,0 +1,44 @@
+# Create A Table From The Structure Of Another
+
+There are a couple ways to create a new table from the structure of another table.
+
+One of those ways is with the [`create table as`
+syntax](https://www.postgresql.org/docs/current/sql-createtableas.html).
+
+```sql
+create table dupe_table as table existing_table with no data;
+```
+
+I wouldn't recommend this approach though because it only reproduces the
+columns and datatypes. The modifiers, indexes, and constraints are not
+included.
+
+The [`create table`
+syntax](https://www.postgresql.org/docs/current/sql-createtable.html), on the
+other hand, gives you more options and flexibility for this kind of task.
+
+```sql
+create table dupe_table (like existing_table);
+```
+
+This works just like the first statement, reproducing just the columns and
+datatypes.
+
+There are options for enhancing this statement. We can tell it to additionally
+_include_ things like `defaults`, `indexes`, `constraints`, or even just
+_everything_ (`including all`).
+
+Here is what it looks like to copy the `existing_table` so that things like
+`not null`, B-Tree indexes, and primary key `default` values are reproduced
+along with the columns and datatypes.
+
+```sql
+create table dupe_table (
+  like existing_table
+    including defaults
+    including indexes
+    including constraints
+)
+```
+
+[source](https://www.reddit.com/r/PostgreSQL/comments/uu8xcs/comment/i9e36m2/)