根据二代人行征信，写3个指标的中英文名，并对其写伪代码指标逻辑和sql逻辑

1. 逾期次数 Overdue Count
伪代码指标逻辑：

for each loan in loans:
    if loan.status == "Overdue":
        overdue_count += 1

SQL逻辑：

SELECT COUNT(*) AS overdue_count
FROM loan
WHERE status = 'Overdue'

2. 贷款总额 Total Loan Amount
伪代码指标逻辑：

for each loan in loans:
    total_loan_amount += loan.amount

SQL逻辑：

SELECT SUM(amount) AS total_loan_amount
FROM loan

3. 信用卡额度总额 Total Credit Line
伪代码指标逻辑：

for each credit_card in credit_cards:
    total_credit_line += credit_card.credit_limit

SQL逻辑：

SELECT SUM(credit_limit) AS total_credit_line
FROM credit_card