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SQL code:
CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_Test`(
in $W_id int
)
BEGIN
DECLARE $type int DEFAULT 0;
DECLARE $preID int;
DECLARE $nextID int;
DECLARE $preName varchar(50);
DECLARE $nextName varchar(50);
SELECT `W_Type` INTO $type from `tb_Writings`
WHERE `W_ID`=$W_id;
SELECT `W_ID`,`W_Name` INTO $nextID,$nextName from `tb_Writings`
WHERE `W_ID`>$W_id AND `W_Type`=$type
ORDER BY `W_ID` ASC LIMIT 1;
SELECT `W_ID`,`W_Name` INTO $preID,$prename from `tb_Writings`
WHERE `W_ID`<$W_id AND `W_Type`=$type
ORDER BY `W_ID` DESC LIMIT 1;
SELECT $preID AS `PreID`,$nextID AS `NextID`,$preName AS `PreName`,$nextName AS `NextName`;
END
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</head>
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