LIKE

models/book/book.go

 		sql += ` and a.borrow_status = '` + borrowStatus + `' `
 	}
 	if customerName != "" {
-		sql += ` and a.customer_name = '` + customerName + `' `
+		sql += ` and a.customer_name like '%` + customerName + `%' `
 	}
 	if customerPhone != "" {
-		sql += ` and a.customer_phone ='` + customerPhone + `' `
+		sql += ` and a.customer_phone like'%` + customerPhone + `%' `
 	}
 	if bookName != "" {
-		sql += ` and b.book_name = '` + bookName + `' `
+		sql += ` and (b.book_name like '%` + bookName + `%')`
 	}
 	if barcode != "" {
 		sql += ` and b.book_barcode = '` + barcode + `'`