Add Two Ways To Escape A Quote In A String as a Postgres til

postgres/two-ways-to-escape-a-quote-in-a-string.md

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+# Two Ways To Escape A Quote In A String
+
+String literals in PostgreSQL have to be wrapped in single quotes. This can be
+tricky if you are faced with writing out a query using a string that contains a
+single quote.
+
+```sql
+> select 'who's on first?';
+...
+```
+
+The query won't execute because it is waiting for you to close the second set
+of quotes.
+
+I know of two ways to handle this situation.
+
+The first is to put two single quotes back to back. The first will cause the
+second to be escaped so that the quote shows up in the string.
+
+```sql
+> select 'who''s on first?';
+    ?column?
+-----------------
+ who's on first?
+(1 row)
+```
+
+The second is to prepend the string with [the `E`
+character](https://www.postgresql.org/docs/current/sql-syntax-lexical.html#SQL-SYNTAX-STRINGS)
+to allow escape sequences in strings.
+
+```sql
+> select E'who\'s on first?';
+    ?column?
+-----------------
+ who's on first?
+(1 row)
+```
+
+[source](https://stackoverflow.com/a/12320729)