> Make sure to check documentation https://clickhouse.com/docs/en/ first. If the question is concise and probably has a short answer, asking it in Telegram chat https://telegram.me/clickhouse_en is probably the fastest way to find the answer. For more complicated questions, consider asking them on StackOverflow with "clickhouse" tag https://stackoverflow.com/questions/tagged/clickhouse 

> If you still prefer GitHub issues, remove all this text and ask your question here.

sql【1】:  
`select count()
from (
         SELECT event_dt
         FROM (select event_dt, 403 AS event_id
               from (
                        select event_dt
                        from tba as tba
                        where event_id = 9
                          and ((tba.event_dt >= 20220822 and tba.event_dt <= 20220822))
                        )) tba
         WHERE tba.event_dt >= 20220822
           and tba.event_dt <= 20220822
         );`

sql【2】:
`select count()
from (
         SELECT event_dt
         FROM (select event_dt, 403 AS event_id
               from (
                        select event_dt
                        from tba as tba
                        where event_id = 9
                          and ((tba.event_dt >= 20220822 and tba.event_dt <= 20220822))
                        )) tba
         WHERE tba.event_dt >= 20220822
           and tba.event_dt <= 20220822
           and event_id = 403
         );`

why sql【2】result less data
{
public:
    explicit Tree(const IAST * ast_) : ast(ast_) { assert(ast); }
    explicit Tree(const ActionsDAG::Node * dag_) : dag(dag_) { assert(dag); }
    std::string getColumnName() const
    {
        if (ast)
            return ast->getColumnNameWithoutAlias();
        else
            return getColumnNameWithoutAlias(*dag);
    }
    std::string getColumnNameLegacy() const
    {
        if (ast)
        {
            auto adjusted_ast = ast->clone();
            KeyDescription::moduloToModuloLegacyRecursive(adjusted_ast);
            return adjusted_ast->getColumnNameWithoutAlias();
        }
        else
            return getColumnNameWithoutAlias(*dag, true);
    }
    bool isFunction() const
    {
        if (ast)
            return typeid_cast<const ASTFunction *>(ast);
        else
            return dag->type == ActionsDAG::ActionType::FUNCTION;
    }
    bool isConstant() const