6 lines
275 B
MySQL
6 lines
275 B
MySQL
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ALTER TABLE "history" ADD COLUMN "idref" TEXT;
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ALTER TABLE "history" ADD CONSTRAINT "history_idref_fkey" FOREIGN KEY ("idref") REFERENCES "questions"("id") ON DELETE SET NULL ON UPDATE RESTRICT;
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UPDATE "history" SET idref = id WHERE id in (SELECT id FROM "questions");
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