...```
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
contrac...
...
SELECT t.tx_hash, e.amount
FROM ethereum.transactions t
JOIN ethereum.erc20_events e ON t.tx_hash = e.tx_hash;
-- ✅ 正确：清晰的表名和明确的 AS
-- ✅ 正确：清晰的联接
select
txs.tx_hash
, evt.amount
from ethereum.transactions as txs
join ethereum.e...