java - 谁能帮我解决这个sql查询

Question

我在 PreparedSentence 中有以下包含 SQL 查询的代码:

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);
}

如果我通过 P.CODE 使用搜索，效果会很好: WHERE P.CODE = ? AND C.SITEGUID = ?。但是，假设我希望它在 P.REFERENCE 中找到结果(如果 P.CODE 中没有任何匹配项)。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 = ?，但我收到错误。任何帮助将不胜感激。

Answer 1

对 OR 语句进行分组

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);