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Updated readme [skip ci]

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Andrew Kane
2023-04-22 17:07:10 -07:00
parent 5146c7cc57
commit 6383078029
1 changed files with 3 additions and 3 deletions
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README.md
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@@ -40,7 +40,7 @@ Create a vector column with 3 dimensions
CREATE TABLE items (id bigserial PRIMARY KEY, embedding vector(3)); CREATE TABLE items (id bigserial PRIMARY KEY, embedding vector(3));
``` ```
Insert values Insert vectors
```sql ```sql
INSERT INTO items (embedding) VALUES ('[1,2,3]'), ('[4,5,6]'); INSERT INTO items (embedding) VALUES ('[1,2,3]'), ('[4,5,6]');
@@ -128,7 +128,7 @@ SELECT embedding <-> '[3,1,2]' AS distance FROM items;
For inner product, multiply by -1 (since `<#>` returns the negative inner product) For inner product, multiply by -1 (since `<#>` returns the negative inner product)
```sql ```sql
SELECT -1 * (embedding <#> '[3,1,2]') AS inner_product FROM items; SELECT (embedding <#> '[3,1,2]') * -1 AS inner_product FROM items;
``` ```
For cosine similarity, use 1 - cosine distance For cosine similarity, use 1 - cosine distance
@@ -137,7 +137,7 @@ For cosine similarity, use 1 - cosine distance
SELECT 1 - (embedding <=> '[3,1,2]') AS cosine_similarity FROM items; SELECT 1 - (embedding <=> '[3,1,2]') AS cosine_similarity FROM items;
``` ```
#### Averaging #### Aggregates
Average vectors Average vectors