Sqlite错误包括where子句可以帮助我的任何人

Question

SELECT contactPhoneID, contactName, contactNumber, contactNumberType,
  contactEmail, contactImage, contactSortKey, contactCountryCode,
  contactRingTone, contactStatus, contactTimeStamp, contactMoodName,
  contactMoodType, contactEmotiUserFlag, contactSpeedDialID,
  contactSpeedDialFlag, contactFavorites, GROUP_CONCAT(contactNumber) AS contactNumber,
  contactName
FROM CONTACT_TABLE
WHERE contactFavorites = 'TRUE'
GROUP BY contactPhoneID

你好得到错误where where子句在它旁边添加它完美地工作

Answer 1

为了使您的查询正常工作，您需要按所有非聚合列进行分组：

SELECT contactPhoneID, contactName, contactNumber, contactNumberType,
  contactEmail, contactImage, contactSortKey, contactCountryCode,
  contactRingTone, contactStatus, contactTimeStamp, contactMoodName,
  contactMoodType, contactEmotiUserFlag, contactSpeedDialID,
  contactSpeedDialFlag, contactFavorites, GROUP_CONCAT(contactNumber) AS contactNumber,
  contactName
FROM CONTACT_TABLE
WHERE contactFavorites = 'TRUE'
GROUP BY contactPhoneID, contactName, contactNumber, contactNumberType,
  contactEmail, contactImage, contactSortKey, contactCountryCode,
  contactRingTone, contactStatus, contactTimeStamp, contactMoodName,
  contactMoodType, contactEmotiUserFlag, contactSpeedDialID,
  contactSpeedDialFlag, contactFavorites

MySQL支持非标准分组行为，如果按少于所有非聚合列进行分组，则每个唯一组将返回一个随机行。 AFAIK，如果你尝试这个，所有其他数据库都会抛出语法异常。