view/backend/examples/sql.txt

-- Create klines table for 1-minute candlestick data
CREATE TABLE IF NOT EXISTS klines_1m (
    symbol          VARCHAR(20) NOT NULL,
    timestamp       BIGINT NOT NULL,
    open            DOUBLE PRECISION NOT NULL,
    high            DOUBLE PRECISION NOT NULL,
    low             DOUBLE PRECISION NOT NULL,
    close           DOUBLE PRECISION NOT NULL,
    volume          DOUBLE PRECISION NOT NULL,
    taker_buy_volume DOUBLE PRECISION NOT NULL,
    net_volume      DOUBLE PRECISION NOT NULL,
    PRIMARY KEY (symbol, timestamp)
);

-- Convert to TimescaleDB hypertable for better time-series performance
-- chunk_time_interval = 7 days (in milliseconds: 7 * 24 * 60 * 60 * 1000 = 604800000)
SELECT create_hypertable('klines_1m', 'timestamp', 
    chunk_time_interval => 604800000,
    if_not_exists => TRUE
);

-- Create index for faster queries by symbol
CREATE INDEX IF NOT EXISTS idx_klines_1m_symbol ON klines_1m (symbol, timestamp DESC);

-- Table for tracking active symbols
CREATE TABLE IF NOT EXISTS tracked_symbols (
    symbol      VARCHAR(20) PRIMARY KEY,
    added_at    TIMESTAMP DEFAULT NOW(),
    is_active   BOOLEAN DEFAULT TRUE
);

-- Insert some default symbols
INSERT INTO tracked_symbols (symbol) VALUES 
    ('btcusdt'),
    ('ethusdt')
ON CONFLICT (symbol) DO NOTHING;

-- Useful queries:

-- Get latest timestamp for a symbol
-- SELECT MAX(timestamp) FROM klines_1m WHERE symbol = 'BTCUSDT';

-- Get latest N candles for a symbol
-- SELECT * FROM klines_1m WHERE symbol = 'BTCUSDT' ORDER BY timestamp DESC LIMIT 100;

-- Get all active symbols
-- SELECT symbol FROM tracked_symbols WHERE is_active = TRUE;