谁能帮我解决这个sql查询

Question

我有以下带有 SQL 查询的代码PreparedSentence：public final ProductInfoExt getProductInfoByCode(String sCode, String siteGuid) throws BasicException {    if (sCode.startsWith("977")) {        // This is an ISSN barcode (news and magazines)         // the first 3 digits correspond to the 977 prefix assigned to serial publications,         // the next 7 digits correspond to the ISSN of the publication         // Anything after that is publisher dependant - we strip everything after          // the 10th character         sCode = sCode.substring(0, 10);    }    return (ProductInfoExt) new PreparedSentence(s, "SELECT "            + getSelectFieldList()            + " FROM STOCKCURRENT AS C RIGHT JOIN PRODUCTS P ON (C.PRODUCT = P.ID) "            + " WHERE P.CODE OR (P.REFERENCE = ? ) AND C.SITEGUID = ? ",            new SerializerWriteBasicExt(new Datas[]{Datas.OBJECT, Datas.STRING, Datas.OBJECT, Datas.STRING}, new int[]{0, 1}),            ProductInfoExt.getSerializerRead()).find(sCode, siteGuid);}P.CODE如果我通过:进行搜索，效果会很好WHERE P.CODE = ? AND C.SITEGUID = ?。P.REFERENCE但是，假设我希望它在if 中没有匹配的情况下找到结果P.CODE。我尝试执行这样的代码语句，但没有成功：WHERE P.CODE OR P.REFERENCE = ? AND C.SITEGUID = ?，但收到错误。任何帮助将不胜感激。

Answer 1

OR将你的陈述分组

return (ProductInfoExt) new PreparedSentence(s, "SELECT "
        + getSelectFieldList()
        + " FROM STOCKCURRENT AS C RIGHT JOIN PRODUCTS P ON (C.PRODUCT = P.ID) "
        + " WHERE (P.CODE = ? OR P.REFERENCE = ?) AND C.SITEGUID = ? ",
        new SerializerWriteBasicExt(new Datas[]{Datas.OBJECT, Datas.STRING, Datas.OBJECT, Datas.STRING, Datas.OBJECT, Datas.STRING}, new int[]{0, 1, 2}),
        ProductInfoExt.getSerializerRead()).find(sCode, sCode, siteGuid);

Answer 2

你的语法错误，应该是

WHERE (P.CODE = ?  OR P.REFERENCE = ?) AND C.SITEGUID = ?

然后你需要设置第三个参数