crypto_quant/sql/query/sql_playground.sql

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

SET SQL_SAFE_UPDATES = 0;
delete from crypto_market_data where create_time is NULL;
refactor code for mysql data handler 2025-07-28 04:29:31 +00:00			`select * from crypto_market_data`
1. support update huge volume data a. update market data at first b. According to the first updated market data timestamp, get earlier window-size records. c. Calculate huge volume data by the latest market data d. Only insert new data to huge volume table 2. rename code file to be more proper. 2025-07-28 08:14:40 +00:00			`WHERE symbol='XCH-USDT' and bar='5m' and date_time > '2025-07-26'`
refactor code for mysql data handler 2025-07-28 04:29:31 +00:00			`order by timestamp desc;`
1. support update huge volume data a. update market data at first b. According to the first updated market data timestamp, get earlier window-size records. c. Calculate huge volume data by the latest market data d. Only insert new data to huge volume table 2. rename code file to be more proper. 2025-07-28 08:14:40 +00:00
			`SET SQL_SAFE_UPDATES = 0;`
			`delete from crypto_market_data where create_time is NULL;`