小编H.R*_*imy的帖子

编写此查询的更好方法是什么?

我的数据库(Postgresql 10)具有以下架构:

CREATE TABLE "PulledTexts" (
"Id" serial PRIMARY KEY,
"BaseText" TEXT,
"CleanText" TEXT
);

CREATE TABLE "UniqueWords" (
"Id" serial PRIMARY KEY,
"WordText" TEXT
);

CREATE TABLE "WordTexts" (
"Id" serial PRIMARY KEY,
"TextIdId" INTEGER REFERENCES "PulledTexts",
"WordIdId" INTEGER REFERENCES "UniqueWords"
);
CREATE INDEX "IX_WordTexts_TextIdId" ON "WordTexts" ("TextIdId");
CREATE INDEX "IX_WordTexts_WordIdId" ON "WordTexts" ("WordIdId");
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一些示例数据:

INSERT INTO public."PulledTexts" ("Id", "BaseText", "CleanText") VALUES
(1, 'automate business audit', null),
(2, 'audit trial', null),
(3, 'trial', null),
(4, 'audit', null),
(5, 'fresh …
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postgresql performance subquery relational-division postgresql-performance

5
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1
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