================================================================================
Table: billiards_dwd.dwd_member_balance_change_ex
Primary Key: balance_change_id
================================================================================

## COLUMNS
--------------------------------------------------------------------------------
balance_change_id: bigint | nullable=NO | PK
pay_site_name: character varying(64) | nullable=YES | 
register_site_name: character varying(64) | nullable=YES | 
refund_amount: numeric(18,2) | nullable=YES | 
operator_id: bigint | nullable=YES | 
operator_name: character varying(64) | nullable=YES | 

## VALUE ANALYSIS (for enum detection)
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balance_change_id:
  Total: 4745, Non-null: 4745, Distinct: 4745
  Top values:
    2803564669930693: 1
    2903462915460485: 1
    2830174531963973: 1
    2955043181414661: 1
    3008791754705413: 1
    2857467495761733: 1
    2939340594416005: 1
    2951010696136837: 1
    3030232907139141: 1
    2802394731760837: 1
    2813556454443461: 1
    2806436244653957: 1
    3058422348711749: 1
    3057603406514501: 1
    2973479954155397: 1

pay_site_name:
  Total: 4745, Non-null: 4720, Distinct: 1
  *** LIKELY ENUM (distinct <= 15) ***
  Top values:
    朗朗桌球: 4720

register_site_name:
  Total: 4745, Non-null: 4745, Distinct: 1
  *** LIKELY ENUM (distinct <= 15) ***
  Top values:
    朗朗桌球: 4745

operator_id:
  Total: 4745, Non-null: 4745, Distinct: 4
  *** LIKELY ENUM (distinct <= 15) ***
  Top values:
    2790687322443013: 4477
    2790687633313029: 124
    2800459869441029: 115
    2800457030093701: 29

operator_name:
  Total: 4745, Non-null: 4745, Distinct: 6
  *** LIKELY ENUM (distinct <= 15) ***
  Top values:
    收银员:郑丽珊: 4101
    店长:郑丽珊: 223
    管理员：郑丽珊: 153
    店长:蒋雨轩: 124
    店长:谢晓洪: 115
    店长:黄月柳: 29

## SAMPLE DATA (first 10 rows)
--------------------------------------------------------------------------------
Columns: ['balance_change_id', 'pay_site_name', 'register_site_name', 'refund_amount', 'operator_id', 'operator_name']

Row 1:
  balance_change_id: 2957881605869253
  pay_site_name: 朗朗桌球
  register_site_name: 朗朗桌球
  refund_amount: 0.00
  operator_id: 2790687322443013
  operator_name: 收银员:郑丽珊

Row 2:
  balance_change_id: 2957821969387205
  pay_site_name: 朗朗桌球
  register_site_name: 朗朗桌球
  refund_amount: 0.00
  operator_id: 2790687322443013
  operator_name: 收银员:郑丽珊

Row 3:
  balance_change_id: 2957814218313541
  pay_site_name: 朗朗桌球
  register_site_name: 朗朗桌球
  refund_amount: 0.00
  operator_id: 2790687322443013
  operator_name: 收银员:郑丽珊

Row 4:
  balance_change_id: 2957799362285445
  pay_site_name: 朗朗桌球
  register_site_name: 朗朗桌球
  refund_amount: 0.00
  operator_id: 2790687322443013
  operator_name: 收银员:郑丽珊

Row 5:
  balance_change_id: 2957788164099589
  pay_site_name: 朗朗桌球
  register_site_name: 朗朗桌球
  refund_amount: 0.00
  operator_id: 2790687322443013
  operator_name: 收银员:郑丽珊

Row 6:
  balance_change_id: 2957785618632197
  pay_site_name: 朗朗桌球
  register_site_name: 朗朗桌球
  refund_amount: 0.00
  operator_id: 2790687322443013
  operator_name: 收银员:郑丽珊

Row 7:
  balance_change_id: 2957766036278981
  pay_site_name: 朗朗桌球
  register_site_name: 朗朗桌球
  refund_amount: 0.00
  operator_id: 2790687322443013
  operator_name: 收银员:郑丽珊

Row 8:
  balance_change_id: 2957747803377477
  pay_site_name: 朗朗桌球
  register_site_name: 朗朗桌球
  refund_amount: 0.00
  operator_id: 2790687322443013
  operator_name: 收银员:郑丽珊

Row 9:
  balance_change_id: 2957675844718277
  pay_site_name: 朗朗桌球
  register_site_name: 朗朗桌球
  refund_amount: 0.00
  operator_id: 2790687322443013
  operator_name: 收银员:郑丽珊

Row 10:
  balance_change_id: 2957620513558213
  pay_site_name: 朗朗桌球
  register_site_name: 朗朗桌球
  refund_amount: 0.00
  operator_id: 2790687322443013
  operator_name: 收银员:郑丽珊