㊠ã ã®ã‚¹ãƒšãƒ¼ã‚¹è¦ªå関係を hierarchyid ã§è¡¨ã—ã¦ã€è‡ªåˆ†å«ã‚ã¦è‡ªåˆ†ã‚ˆã‚Šä¸‹ä½ã®ãƒ‡ãƒ¼ã‚¿ã‚’検索ã™ã‚‹ã“ã¨ãŒã‚ã£ãŸã®ã§ã€ã¡ã‚‡ã£ã¨ç¢ºèªã€‚ 階層データ (SQL Server) - SQL Server | Microsoft Learn ã¨ã‚Šã‚ãˆãšã‚¯ã‚¨ãƒªã¯ã“ã‚“ãªã® drop table if exists [階層型テスト] create table [階層型テスト] ( [PK] bigint not null primary key , [階層PK] hierarchyid not null index [IX_階層型テスト_階層PK] , [備考] nvarchar(max) ) ; begin tran ; with [cte] as ( select 0 as [seq] union all select [seq] + 1 from [cte] where [seq] < 99999 ) inse
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