##Instruction:
Database: store_1
Total Tables: 11
Total Columns: 64

Table Schemas:

store_1 contains tables such as artists, sqlite_sequence, albums, employees, customers, genres, invoices, media_types, tracks, invoice_lines, playlists, playlist_tracks.
Table artists has columns such as id, name.
id is the primary key.
Table sqlite_sequence has columns such as name, seq.
Table albums has columns such as id, title, artist_id.
id is the primary key.
Table employees has columns such as id, last_name, first_name, title, reports_to, birth_date, hire_date, address, city, state, country, postal_code, phone, fax, email.
id is the primary key.
Table customers has columns such as id, first_name, last_name, company, address, city, state, country, postal_code, phone, fax, email, support_rep_id.
id is the primary key.
Table genres has columns such as id, name.
id is the primary key.
Table invoices has columns such as id, customer_id, invoice_date, billing_address, billing_city, billing_state, billing_country, billing_postal_code, total.
id is the primary key.
Table media_types has columns such as id, name.
id is the primary key.
Table tracks has columns such as id, name, album_id, media_type_id, genre_id, composer, milliseconds, bytes, unit_price.
id is the primary key.
Table invoice_lines has columns such as id, invoice_id, track_id, unit_price, quantity.
id is the primary key.
Table playlists has columns such as id, name.
id is the primary key.
Table playlist_tracks has columns such as playlist_id, track_id.
playlist_id is the primary key.
The artist_id of albums is the foreign key of id of artists.
The reports_to of employees is the foreign key of id of employees.
The support_rep_id of customers is the foreign key of id of employees.
The customer_id of invoices is the foreign key of id of customers.
The media_type_id of tracks is the foreign key of id of media_types.
The genre_id of tracks is the foreign key of id of genres.
The album_id of tracks is the foreign key of id of albums.
The track_id of invoice_lines is the foreign key of id of tracks.
The invoice_id of invoice_lines is the foreign key of id of invoices.
The track_id of playlist_tracks is the foreign key of id of tracks.
The playlist_id of playlist_tracks is the foreign key of id of playlists.

##Role Access Policy (Column-Level):
Role: DataOperator_3
Accessible Columns:
  - albums: artist_id, id
  - artists: * (all columns)
  - customers: address, city, country, first_name, id, last_name, state
  - employees: * (all columns)
  - genres: * (all columns)
  - invoice_lines: id, invoice_id, quantity
  - invoices: billing_address, billing_city, billing_country, billing_postal_code, billing_state, customer_id, invoice_date, total
  - media_types: * (all columns)
  - playlist_tracks: * (all columns)
  - playlists: name
  - sqlite_sequence: * (all columns)
  - tracks: * (all columns)

Question: Find out 5 customers who most recently purchased something. List customers' first and last name.
Answer: SELECT T1.first_name ,  T1.last_name FROM customers AS T1 JOIN invoices AS T2 ON T2.customer_id  =  T1.id ORDER BY T2.invoice_date DESC LIMIT 5;
Permission: allowed (All required columns are permitted)
Gold SQL: SELECT T1.first_name ,  T1.last_name FROM customers AS T1 JOIN invoices AS T2 ON T2.customer_id  =  T1.id ORDER BY T2.invoice_date DESC LIMIT 5;