obclient> CREATE TABLE student( id int , name varchar(18), sex char(1), age int, address varchar(200), email varchar(100), date date, PRIMARY KEY (id) ); ERROR 1050 (42S01): Table 'student' already exists 该报错信息对应的错误码信息如下: 错误码:ERROR 1050 OceanBase 错误码:5020 ...
1 row in set If the table already exists, rename the existing table and then create the table again. For example, rename the existingstudenttable ast_stu. obclient> ALTER TABLE student RENAME TO t_stu; Query OK, 0 rows affected Note If the table is no longer needed, you can also use...
在执行SQL语句时出现“SQLSTATE[42S01]:Basetableorviewalreadyexists:1050Table'tags'alreadyexists”错误提示。 这个错误提示说明表“tags”已经存在,而我们想再次创建这个表,因此需要先删除已经存在的表。以下是删除表示例的代码: DROP TABLE IF EXISTS tags; 在执行这个语句后,我们可以再次创建表“tags”了,例如:...
obclient>ALTERTABLEstudentRENAMETOt_stu;Query OK,0rowsaffected 说明 如果经确认该表确实不需要了,也可以使用DROP TABLE语句将该表删除后再重新创建表。 基于Oracle 模式进行应用开发 反馈 鼠标选中内容,快速反馈问题 选中文档中有疑惑的内容,即可快速反馈问题,我们将会跟进处理。
What then could an S-LCA bring to the table that these other types of assessments would not? How could, in this case, a Social Life Cycle Assessment benefit both stakeholders and energy production company (wind farm owner) in a way that would make it a more successful and preferable ...
Table 4. Discriminant validity test. Con PE Sat HF PI Co 0.818 a PE 0.585 0.802 a Sat 0.617 0.786 0.798 a HF 0.382 0.697 0.742 0.784 a PI 0.365 0.701 0.778 0.655 0.729 a Note: The diagonal terms indicate the AVE for each construct, the upper terms indicate the square root of AVE ...
Table 2. Definitions of service system. 2.2.2. Sphere of Service Ecosystem A precondition for understanding the term service ecosystem is the definition of the term business ecosystem. Business ecosystem theories explain how enterprises interact with their environment to produce a product or deliver ...
20. RIVM Tabel testresultaten FFP maskers [Table of Test Results FFP Masks]. Available online: https://www.rivm.nl/documenten/ tabel-testresultaten-ffp-maskers (accessed on 19 June 2020). 21. Anderegg, L.; Meisenhelder, C.; Ngooi, C.O.; Liao, L.; Xiao, W.; Chu, S.; Cui...
Supplementary Materials: The following are available online at https://www.mdpi.com/2071-1 050/13/5/2628/s1, Figure S1: General questions asked about allotments; Table S1: Fertilisers, pest control and weed control methods used by allotment gardeners, with frequency of applications (count of ...
4. Results One of the specific strengths of coupling IPA with AHP lies in the fact that the technological innovations are measured considering multiple and weighted effects of environmental and social sustainability. Table 5 displays a summary of local weights assigned to sustainability effects. It ...