目录
- 53.1. COUNT
- 53.2. group_concat() 列传行
- 53.3. UUID()
- 53.4. String
-
- 53.4.1. LEFT/RIGHT
- 53.4.2. RPAD/LPAD
- 53.4.3. CONCAT
- 53.4.4. CONCAT_WS
- 53.4.5. 链接所有字段
- 53.4.6. GROUP_CONCAT
- 53.4.7. replace
- 53.4.8. SUBSTRING
- 53.4.9. SUBSTRING_INDEX
- 53.4.10. AES_ENCRYPT / AES_DECRYPT
- 53.5. Date and Time
-
- 53.5.1. year/month/day hour:minite:second
- 53.5.2. Unix time
- 53.5.3. DATE_FORMAT
- 53.5.4. DATE_SUB/DATE_ADD
-
- 53.5.4.1. DATE_ADD
- 53.5.5. datediff / timediff
- 53.6. 数值函数
-
- 53.6.1. cast 类型转换
- 53.6.2. truncate 保留小数位数
- 53.6.3. MOD 求余
- 53.7. Control Flow Functions
53.1. COUNT
count()
SELECT (SELECT count(1) FROM ecs_category) as 'Export category count', (SELECT count(1) FROM ecs_goods) as 'Goods count', (SELECT count(1) FROM ecs_goods_attr) as 'Attr count';
原文出处：Netkiller 系列 手札
本文作者：陈景峯
转载请与作者联系，同时请务必标明文章原始出处和作者信息及本声明。
