docs/guide-ja/db-query-builder.md - started translation [ci skip]
docs/guide-ja/db-query-builder.md - WIP [ci skip]
docs/guide-ja/db-query-builder.md - WIP [ci skip]
docs/guide-ja - changed "空っぽ" to "空" [ci skip]
docs/guide-ja/db-dao.md - changed "プリペア" to "準備" [ci skip]
docs/guide-ja/db-query-builder.md - completed [ci skip]
Merge pull request #6370 from softark/docs-guide-ja-db-query-builder

docs/guide-ja/db-query-builder.md added [ci skip]