select * from crypto_market_data
WHERE symbol='XCH-USDT-SWAP' and bar='5m' #and date_time > '2025-07-01'
order by timestamp desc;

delete FROM crypto_market_data where symbol != 'XCH-USDT';

select * from crypto_trade_data
where symbol='BTC-USDT'
order by ts desc;

select count(1) from crypto_trade_data;

select * from crypto_huge_volume
WHERE symbol='XCH-USDT' and bar='5m' and date_time > '2025-07-26'
order by timestamp desc;

select * from crypto_huge_volume
WHERE symbol='XCH-USDT-SWAP' and bar='5m' and date_time > '2025-07-26'
order by timestamp desc;

select * from crypto_huge_volume
WHERE symbol='BTC-USDT' and bar='5m' 
order by timestamp desc
limit 10;

SHOW VARIABLES LIKE 'max_connections';