Suchfunktion bei Key anlegen

v2_adminpanel/init.sql

@@ -5,7 +5,8 @@ CREATE TABLE IF NOT EXISTS customers (
     id SERIAL PRIMARY KEY,
     name TEXT NOT NULL,
     email TEXT,
-    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT unique_email UNIQUE (email)
 );
 
 CREATE TABLE IF NOT EXISTS licenses (