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AI Translate 07-ngram-index to Simplified-Chinese (#2427)
* [INIT] Start translation to Simplified-Chinese * ๐ŸŒ Translate create-ngram-index.md to Simplified-Chinese --------- Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
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โ€Ž.translation-init

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Translation initialization: 2025-06-09T14:56:27.425738
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Translation initialization: 2025-06-10T12:11:46.148770

โ€Ždocs/cn/sql-reference/10-sql-commands/00-ddl/07-ngram-index/create-ngram-index.md

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import FunctionDescription from '@site/src/components/FunctionDescription';
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<FunctionDescription description="Introduced or updated: v1.2.726"/>
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<FunctionDescription description="ๅผ•ๅ…ฅๆˆ–ๆ›ดๆ–ฐไบŽ๏ผšv1.2.726"/>
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import EEFeature from '@site/src/components/EEFeature';
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<EEFeature featureName='NGRAM INDEX'/>
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ไธบ่กจ็š„ไธ€ไธชๆˆ–ๅคšไธชๅˆ—ๅˆ›ๅปบ Ngram ็ดขๅผ•ใ€‚
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ไธบ่กจ็š„ๆŸไธ€ๅˆ—ๅˆ›ๅปบ Ngram ็ดขๅผ•๏ผˆIndex๏ผ‰ใ€‚
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## ่ฏญๆณ•
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```sql
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-- ๅœจ็Žฐๆœ‰่กจไธŠๅˆ›ๅปบ Ngram ็ดขๅผ•
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CREATE [OR REPLACE] NGRAM INDEX [IF NOT EXISTS] <index_name>
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ON [<database>.]<table_name>(<column1> [, <column2>, ...])
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[gram_size = <number>] [bitmap_size = <number>]
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ON [<database>.]<table_name>(<column>)
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[gram_size = <number>] [bloom_size = <number>]
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-- ๅˆ›ๅปบ่กจๆ—ถๅˆ›ๅปบ Ngram ็ดขๅผ•
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-- ๅœจๅˆ›ๅปบ่กจๆ—ถๅˆ›ๅปบ Ngram ็ดขๅผ•
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CREATE [OR REPLACE] TABLE <table_name> (
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<column_definitions>,
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NGRAM INDEX <index_name> (<column1> [, <column2>, ...])
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[gram_size = <number>] [bitmap_size = <number>]
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NGRAM INDEX <index_name> (<column>)
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[gram_size = <number>] [bloom_size = <number>]
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)...
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```
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- `gram_size` (้ป˜่ฎคไธบ 3) ๆŒ‡ๅฎš็ดขๅผ•ๅˆ—ๆ–‡ๆœฌๆ—ถ๏ผŒๆฏไธชๅŸบไบŽๅญ—็ฌฆ็š„ๅญๅญ—็ฌฆไธฒ๏ผˆn-gram๏ผ‰็š„้•ฟๅบฆใ€‚ไพ‹ๅฆ‚๏ผŒๅฝ“ `gram_size = 3` ๆ—ถ๏ผŒๆ–‡ๆœฌ "hello world" ๅฐ†่ขซๅˆ†ๅ‰ฒๆˆๅฆ‚ไธ‹้‡ๅ ็š„ๅญๅญ—็ฌฆไธฒ๏ผš
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- `gram_size`๏ผˆ้ป˜่ฎคไธบ 3๏ผ‰ๆŒ‡ๅฎšไธบๅˆ—ๆ–‡ๆœฌๅปบ็ซ‹็ดขๅผ•ๆ—ถ๏ผŒๆฏไธชๅŸบไบŽๅญ—็ฌฆ็š„ๅญไธฒ๏ผˆn-gram๏ผ‰็š„้•ฟๅบฆใ€‚ไพ‹ๅฆ‚ๅฝ“ `gram_size = 3` ๆ—ถ๏ผŒๆ–‡ๆœฌ "hello world" ไผš่ขซๅˆ†ๅ‰ฒไธบไปฅไธ‹้‡ๅ ๅญไธฒ๏ผš
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```text
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"hel", "ell", "llo", "lo ", "o w", " wo", "wor", "orl", "rld"
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```
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- `bloom_size` ๆŒ‡ๅฎš Bloom filter ไฝๅ›พ็š„ๅคงๅฐ๏ผˆไปฅๅญ—่Š‚ไธบๅ•ไฝ๏ผ‰๏ผŒ็”จไบŽๅŠ ้€Ÿๆฏไธชๆ•ฐๆฎๅ—ไธญ็š„ๅญ—็ฌฆไธฒๅŒน้…ใ€‚ๅฎƒๆŽงๅˆถ็ดขๅผ•ๅ‡†็กฎๆ€งๅ’Œๅ†…ๅญ˜ไฝฟ็”จไน‹้—ด็š„ๆƒ่กก๏ผš
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- ่พƒๅคง็š„ `bloom_size` ๅ‡ๅฐ‘ไบ†ๅญ—็ฌฆไธฒๆŸฅๆ‰พไธญ็š„่ฏฏๆŠฅ๏ผŒไปŽ่€Œๆ้ซ˜ไบ†ๆŸฅ่ฏข็ฒพๅบฆ๏ผŒไฝ†ไปฃไปทๆ˜ฏ้œ€่ฆๆ›ดๅคš็š„ๅ†…ๅญ˜ใ€‚
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- ่พƒๅฐ็š„ `bloom_size` ่Š‚็œไบ†ๅ†…ๅญ˜๏ผŒไฝ†ๅฏ่ƒฝไผšๅขžๅŠ ่ฏฏๆŠฅใ€‚
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- ๅฆ‚ๆžœๆœชๆ˜พๅผ่ฎพ็ฝฎ๏ผŒๅˆ™้ป˜่ฎคๅ€ผไธบๆฏไธช็ดขๅผ•ๅˆ—ๆฏไธชๅ— 1,048,576 ๅญ—่Š‚๏ผˆ1m๏ผ‰ใ€‚ๆœ‰ๆ•ˆ่Œƒๅ›ดไธบ 512 ๅญ—่Š‚ๅˆฐ 10,485,760 ๅญ—่Š‚๏ผˆ10m๏ผ‰ใ€‚
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- `bloom_size` ๆŒ‡ๅฎš็”จไบŽๅŠ ้€Ÿๆ•ฐๆฎๅ—ๅ†…ๅญ—็ฌฆไธฒๅŒน้…็š„ๅธƒ้š†่ฟ‡ๆปคๅ™จ๏ผˆBloom filter๏ผ‰ไฝๅ›พๅคงๅฐ๏ผˆๅ•ไฝ๏ผšๅญ—่Š‚๏ผ‰๏ผŒๆŽงๅˆถ็ดขๅผ•็ฒพๅบฆไธŽๅ†…ๅญ˜ๅ ็”จ็š„ๅนณ่กก๏ผš
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- ๆ›ดๅคง็š„ `bloom_size` ๅฏๅ‡ๅฐ‘ๅญ—็ฌฆไธฒๆŸฅๆ‰พ็š„่ฏฏๆŠฅ๏ผŒๆๅ‡ๆŸฅ่ฏข็ฒพๅบฆไฝ†ๅขžๅŠ ๅ†…ๅญ˜ๆถˆ่€—
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- ๆ›ดๅฐ็š„ `bloom_size` ่Š‚็œๅ†…ๅญ˜ไฝ†ๅฏ่ƒฝๅขžๅŠ ่ฏฏๆŠฅ
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- ๆœชๆ˜พๅผ่ฎพ็ฝฎๆ—ถ๏ผŒ้ป˜่ฎคๆฏ็ดขๅผ•ๅˆ—ๆฏๆ•ฐๆฎๅ—ๅ ็”จ 1,048,576 ๅญ—่Š‚๏ผˆ1m๏ผ‰๏ผŒๆœ‰ๆ•ˆ่Œƒๅ›ดไธบ 512 ๅญ—่Š‚่‡ณ 10,485,760 ๅญ—่Š‚๏ผˆ10m๏ผ‰
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## ็คบไพ‹
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ไปฅไธ‹็คบไพ‹ๅˆ›ๅปบไบ†ไธ€ไธช่กจ `amazon_reviews_ngram`๏ผŒๅนถๅœจ `review_body` ๅˆ—ไธŠๅˆ›ๅปบไบ†ไธ€ไธช Ngram ็ดขๅผ•ใ€‚่ฏฅ็ดขๅผ•้…็ฝฎไบ† `gram_size` ไธบ 10 ๅ’Œ `bitmap_size` ไธบ 2 MB๏ผŒไปฅไผ˜ๅŒ–ๅคงๅž‹ๆ–‡ๆœฌๅญ—ๆฎต๏ผˆๅฆ‚็”จๆˆท่ฏ„่ฎบ๏ผ‰ไธŠ็š„ๆจก็ณŠๆœ็ดขๆ€ง่ƒฝใ€‚
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### ๅˆ›ๅปบๅธฆ NGRAM ็ดขๅผ•็š„่กจ
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```sql
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CREATE OR REPLACE TABLE amazon_reviews_ngram (
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review_date int(11) NULL,
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marketplace varchar(20) NULL,
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customer_id bigint(20) NULL,
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review_id varchar(40) NULL,
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product_id varchar(10) NULL,
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product_parent bigint(20) NULL,
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product_title varchar(500) NULL,
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product_category varchar(50) NULL,
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star_rating smallint(6) NULL,
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helpful_votes int(11) NULL,
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total_votes int(11) NULL,
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vine boolean NULL,
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verified_purchase boolean NULL,
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review_headline varchar(500) NULL,
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review_body string NULL,
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NGRAM INDEX idx1 (review_body) gram_size = 10 bloom_size = 2097152
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) Engine = Fuse bloom_index_columns='review_body';
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CREATE TABLE articles (
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id INT,
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title VARCHAR,
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content STRING,
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NGRAM INDEX idx_content (content)
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);
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```
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่ฆๆ˜พ็คบๅˆ›ๅปบ็š„็ดขๅผ•๏ผŒ่ฏทไฝฟ็”จ [SHOW INDEXES](../../50-administration-cmds/show-indexes.md) ๅ‘ฝไปค๏ผš
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### ๅœจ็Žฐๆœ‰่กจไธŠๅˆ›ๅปบ NGRAM ็ดขๅผ•
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```sql
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SHOW INDEXES;
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CREATE TABLE products (
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id INT,
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name VARCHAR,
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description STRING
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);
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CREATE NGRAM INDEX idx_description
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ON products(description);
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```
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### ๆŸฅ็œ‹็ดขๅผ•
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```sql
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โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”
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โ”‚ name โ”‚ type โ”‚ original โ”‚ definition โ”‚ created_on โ”‚ updated_on โ”‚
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โ”œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ผโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ผโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ผโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ผโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ผโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ค
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โ”‚ idx1 โ”‚ NGRAM โ”‚ โ”‚ amazon_reviews_ngram(review_body)bloom_size='2097152' gram_size='10' โ”‚ 2025-05-13 01:22:34.123927 โ”‚ NULL โ”‚
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โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜
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SHOW INDEXES;
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```
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็ป“ๆžœ๏ผš
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```
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โ”Œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ฌโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ฌโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ฌโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ฌโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”
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โ”‚ name โ”‚ type โ”‚ original โ”‚ definition โ”‚ created_on โ”‚
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โ”œโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ผโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ผโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ผโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ผโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ค
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โ”‚ idx_content โ”‚ NGRAM โ”‚ โ”‚ articles(content) โ”‚ 2025-05-13 01:22:34.123 โ”‚
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โ”‚ idx_description โ”‚ NGRAM โ”‚ โ”‚ products(description) โ”‚ 2025-05-13 01:23:45.678 โ”‚
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โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ดโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ดโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ดโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ดโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜
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```
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ๆˆ–่€…๏ผŒๆ‚จๅฏไปฅๅ…ˆๅˆ›ๅปบ่กจ๏ผŒ็„ถๅŽๅœจ `review_body` ๅˆ—ไธŠๅˆ›ๅปบ Ngram ็ดขๅผ•๏ผš
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### ไฝฟ็”จ NGRAM ็ดขๅผ•
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```sql
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CREATE TABLE amazon_reviews_ngram (
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review_date int(11) NULL,
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marketplace varchar(20) NULL,
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customer_id bigint(20) NULL,
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review_id varchar(40) NULL,
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product_id varchar(10) NULL,
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product_parent bigint(20) NULL,
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product_title varchar(500) NULL,
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product_category varchar(50) NULL,
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star_rating smallint(6) NULL,
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helpful_votes int(11) NULL,
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total_votes int(11) NULL,
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vine boolean NULL,
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verified_purchase boolean NULL,
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review_headline varchar(500) NULL,
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review_body string NULL
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-- ๅˆ›ๅปบๅธฆ NGRAM ็ดขๅผ•็š„่กจ
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CREATE TABLE phrases (
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id INT,
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text STRING,
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NGRAM INDEX idx_text (text)
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);
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-- ๆ’ๅ…ฅ็คบไพ‹ๆ•ฐๆฎ
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INSERT INTO phrases VALUES
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(1, 'apple banana cherry'),
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(2, 'banana date fig'),
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(3, 'cherry elderberry fig'),
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(4, 'date grape kiwi');
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-- ไฝฟ็”จ NGRAM ็ดขๅผ•่ฟ›่กŒๆจก็ณŠๅŒน้…ๆŸฅ่ฏข
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SELECT * FROM phrases WHERE text LIKE '%banana%';
103104
```
104105

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็ป“ๆžœ๏ผš
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```
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โ”Œโ”€โ”€โ”€โ”€โ”ฌโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”
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โ”‚ id โ”‚ text โ”‚
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โ”œโ”€โ”€โ”€โ”€โ”ผโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ค
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โ”‚ 1 โ”‚ apple banana cherry โ”‚
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โ”‚ 2 โ”‚ banana date fig โ”‚
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โ””โ”€โ”€โ”€โ”€โ”ดโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜
114+
```
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### ๅˆ ้™ค NGRAM ็ดขๅผ•
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105118
```sql
106-
CREATE NGRAM INDEX idx1
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ON amazon_reviews_ngram(review_body)
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gram_size = 10 bloom_size = 2097152;
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DROP NGRAM INDEX idx_text ON phrases;
109120
```

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