Review these examples to see how you can perform an approximate similarity search using vector indexes.

• Approximate Search Using HNSW
  This example shows how you can create the Hierarchical Navigable Small World (HNSW) index and run an approximate search using that index.
• Approximate Search Using IVF
  This example shows how you can create the Inverted File Flat (IVF) index and run an approximate search using that index.