alter table tn modify CONTENT clob;
1.CONTENT is the keyword
2. Keep reminding me that the ORA-22858 data type change is invalid
alter table tn modify CONTENT clob;
1.CONTENT is the keyword
2. Keep reminding me that the ORA-22858 data type change is invalid
alter table tn modify "CONTENT" clob; alter table tn modify column_name (this is the key field name) datatype (, which is the data type to be changed);
Note: in order to ensure integrity (data loss), it is best to back up the data;
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