alter table TB_EXAM_PROBLEM modify PRO_DESC VARCHAR2(4000);alter table TB_EXAM_PROBLEM modify PRO_KEY VARCHAR2(4000);can only be modified one by one?
alter table TB_EXAM_PROBLEM modify PRO_DESC VARCHAR2(4000);alter table TB_EXAM_PROBLEM modify PRO_KEY VARCHAR2(4000);can only be modified one by one?
alter table TB_EXAM_PROBLEM modify PRO_DESC VARCHAR2(4000),
modify PRO_KEY VARCHAR2(4000); Mysql supports an alter statement to modify multiple fields. Separate the different modify with and .
did not understand the problem of the landlord, what is meant by "can only be modified one by one"?
whether you write an alter statement per line of fields, or you reply to modify multiple fields in an alter statement, it's just a command.
if you want to modify multiple fields, put all the command statements to be executed in a sql file, and then execute them in batches.
when writing insert sql statements with python + cx_oracle, the error message is an invalid ORA-01722: number. The field types of the two tables are the same, and they are executed in PL SQL, and the field that reported the error is found. But after loo...
normal hadoop execution hadoop what does it mean that multiple map=0%,reduce=0% appear in succession? Last error report: Error while processing statement: FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask ...
then why is there still the following code? from GEN_ETL.R_AG_1_DAY@TO_CCGENESYS t1, GEN_ETL.O_AG_1_DAY@TO_CCGENESYS t2 ...