SELECT

    SelectStmt:

    FromDual:

    FromDual

    WhereClauseOptional:

    SelectStmtOpts:

    SelectStmtFieldList:

    SelectStmtFieldList

    TableRefsClause:

    WhereClauseOptional:

    WhereClauseOptional

    SelectStmtGroup:

    HavingClause:

    OrderByOptional:

    OrderByOptional

    SelectStmtLimit:

    SelectLockOpt:

    SELECT 语句与 MySQL 完全兼容。如有任何兼容性差异，请在 GitHub 上提交 issue。