Sqlite3遞歸查詢,分頁查詢

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作者：alex_zuo

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技術點：使用Sqlite3實現遞歸查詢，分頁查詢

向下遞歸

向上遞歸

Sqlite的分頁查詢

limit N表示取N個記錄.

offset P表示從下標P開始, 第一行的下標是0, 也可以理解爲跳過P行.

limit要放在查詢語句的最後:

select * from finery where id > 7 order by id limit 10 offset 0;

遞歸查詢可複製sql：

WITH RECURSIVE  down(id,name,pid,layer,sort,type_id,is_piece,piece_Id,type_tree_id,group_id) AS   
( 
    SELECT id,name,pid,layer,sort,type_id,is_piece,piece_Id,type_tree_id,group_id 
    FROM t_product_tree   
    WHERE id='2014112411014156812'   
    UNION   
    SELECT a.id,a.name,a.pid,a.layer,a.sort,a.type_id,a.is_piece,a.piece_Id,a.type_tree_id,a.group_id                                                                         
    FROM t_product_tree a,down b 
    WHERE b.id = a.pid   
) SELECT * from down 


WITH RECURSIVE  up(id,name,pid,layer,sort,type_id,is_piece,piece_Id,type_tree_id,group_id) AS   
( 
    SELECT id,name,pid,layer,sort,type_id,is_piece,piece_Id,type_tree_id,group_id 
    FROM t_product_tree   
    WHERE id='2014112411014156812'   
    UNION   
    SELECT a.id,a.name,a.pid,a.layer,a.sort,a.type_id,a.is_piece,a.piece_Id,a.type_tree_id,a.group_id                                                                         
    FROM t_product_tree a,up b 
    WHERE b.pid = a.id   
) SELECT * from up