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munus conditionalis

• SI(): Valorem reddit si condicio vera est, aliter valorem redit.

-- 示例：根据员工的薪水返回薪水等级  
SELECT name, salary,  
       IF(salary < 3000, 'Low',  
          IF(salary BETWEEN 3000 AND 7000, 'Medium', 'High')) AS salary_level  
FROM employees;

• CAUSA: Logica conditionalis magis implicata, similis rationi mutandi causa in programmandis linguis.

SELECT 
    CASE 
        WHEN score >= 90 THEN 'A'
        WHEN score >= 80 THEN 'B'
        WHEN score >= 70 THEN 'C'
        WHEN score >= 60 THEN 'D'
        ELSE 'F'
    END AS grade
FROM students;

• COCO (): refert primum valorem non nullum in indice parametri.

SELECT name, COALESCE(city, 'Unknown') AS city
FROM students;

encryption munus

• MD5(): Adice MD5 Nullam valorem chordae.

-- 示例：对用户的密码进行MD5加密  
SELECT MD5('password123') AS encrypted_password;

• SHA1(): SHA-1 Nullam valorem chordae computa.

SELECT SHA1('7895656')

conversio munus

• FLO(): Converte dictio certa notitia generis.

-- 示例：将字符串转换为整数  
SELECT CAST('123' AS UNSIGNED) AS number;

• CONVERTERE(): munus FACTUM simile est, conversionis genus adhibitum.

-- 示例：将日期字符串转换为日期类型  
SELECT CONVERT('2023-01-01', DATE) AS converted_date;