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				@@ -103,13 +103,13 @@ module.exports = app => { 
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				         } 
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				         async getPreMinusChange(tid, sorder) { 
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				-            const sql = 'SELECT lid, pid, SUM(qty) FROM ' + this.tableName + ' WHERE tid = ? and sorder < ? GROUP BY lid, pid'; 
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				+            const sql = 'SELECT lid, pid, SUM(qty) as qty FROM ' + this.tableName + ' WHERE tid = ? and sorder < ? and minus GROUP BY lid, pid'; 
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				             const data = await this.db.query(sql, [tid, sorder]); 
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				             return data; 
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				         } 
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				         async getMinusChange(tid) { 
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				-            const sql = 'SELECT lid, pid, SUM(qty) FROM ' + this.tableName + ' WHERE tid = ? GROUP BY lid, pid'; 
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				+            const sql = 'SELECT lid, pid, SUM(qty) as qty FROM ' + this.tableName + ' WHERE tid = ? GROUP BY lid, pid'; 
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				             const data = await this.db.query(sql, [tid]); 
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				             return data; 
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				         } 
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