查询表中最新一期资产负债率 ERROR 1055 (42000): Expression #2 of SELECT list is not in GROUP BY clause and contain
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mysql> select ts_code, max(end_date), debt_to_assets from tushare.fina_indicator group by ts_code; ERROR 1055 (42000): Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column ‘tushare.fina_indicator.ann_date‘ which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
目标:查询表中最新一期资产负债率
报错内容:ERROR 1055 (42000): Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column
解决办法:参考https://blog.csdn.net/free377096858/article/details/91963406
问题原因:
ONLY_FULL_GROUP_BY的意思是:对于GROUP BY聚合操作,如果在SELECT中的列,没有在GROUP BY中出现,那么这个SQL是不合法的,因为列不在GROUP BY从句中,也就是说查出来的列必须在group by后面出现,否则就会报错,或者这个字段出现在聚合函数里面。
在select指定的字段要么就要包含在Group By语句的后面,作为分组的依据;要么就要被包含在聚合函数中。
找原因:
查看mysql版本命令:select version();
查看sql_model参数命令:
SELECT @@GLOBAL.sql_mode;
SELECT @@SESSION.sql_mode;
查看:
ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
第一项默认开启ONLY_FULL_GROUP_BY了,导致出现了错误,需要把它的默认关掉。
解决方法:
命令行输入 :
set sql_mode=‘STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION‘;
mysql> select version(); +-----------+ | version() | +-----------+ | 8.0.17 | +-----------+ 1 row in set (0.00 sec) mysql> select @@global.sql_mode; +-----------------------------------------------------------------------------------------------------------------------+ | @@global.sql_mode | +-----------------------------------------------------------------------------------------------------------------------+ | ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION | +-----------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec) mysql> select @@session.sql_mode; +-----------------------------------------------------------------------------------------------------------------------+ | @@session.sql_mode | +-----------------------------------------------------------------------------------------------------------------------+ | ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION | +-----------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec) mysql> set -> sql_mode = ‘STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION‘; Query OK, 0 rows affected (0.00 sec) mysql> select @@session.sql_mode; +----------------------------------------------------------------------------------------------------+ | @@session.sql_mode | +----------------------------------------------------------------------------------------------------+ | STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION | +----------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec) mysql> select ts_code, max(end_date), debt_to_assets from tushare.fina_indicator group by ts_code; +-----------+---------------+----------------+ | ts_code | max(end_date) | debt_to_assets | +-----------+---------------+----------------+ | 000001.SZ | 2019-12-31 | 2.3685 | | 000002.SZ | 2019-12-31 | 75.3555 | | 000004.SZ | 2019-09-30 | 60.0927 | | 000005.SZ | 2019-09-30 | 78.5065 |
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