下列各项中,属于文本函数的是______。A.MAX B.LEN C.SUM D.COUNT

作者: rantiku 人气: - 评论: 0
问题 下列各项中,属于文本函数的是______。
选项 A.MAX B.LEN C.SUM D.COUNT
答案 B
解析 文本函数包括LEN、RIGHT、MID、LEFT四种函数。MAX、SUM、COUNT均是统计函数。

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  • 消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
  • 文件: /twcms/kongphp/cache/cache_redis.class.php
  • 位置: 第 85 行
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