http://www.dba-oracle.com/t_alter_table_rename_column_syntax_example.htm In Oracle9ir2, Oracle provides "alter table" syntax to rename data columns in-place in this form: alter table table_name rename column old_column_name TO new_column_name; Here are some examples of Oracle "alter tabl...
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You cannot use this statement directly to rename columns. However, you can rename a column using theALTERTABLE...rename_column_clause. See Also: rename_column_clause Another way to rename a column is to use theRENAMEstatement together with theCREATETABLEstatement withASsubquery. This method is ...
RENAME COLUMNtable-Name.simple-Column-NameTOsimple-Column-Name Examples To rename themanagercolumn in tableemployeetosupervisor, use the following syntax: RENAME COLUMN EMPLOYEE.MANAGER TO SUPERVISOR You can combine ALTER TABLE and RENAME COLUMN to modify a column's data type. To change columnc1of...
list of key and/or partitioning columns to ensure that the index'partitioning columns form a subset of its key columns 唯一索引中无分区列,无法创建唯一索引,因此修改主键约束列,添加分区列 alter table TS_PM add constraint POWER_MONITOR_PM_new primary key (POWER_CONS_MONITOR_ID,START_TIME)usingind...
When the rename operation is in progress, other threads cannot read any tables. If you use this statement to rename multiple tables, the rename operation proceeds from left to right. Before you execute the RENAME TABLE statement, make sure that no table is locked and no transaction is active...
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This exercise shows how to merge DataFrames and rename specific columns in the resulting DataFrame.Sample Solution :Code :import pandas as pd # Create two sample DataFrames df1 = pd.DataFrame({ 'ID': [1, 2, 3], 'Name': ['Selena', 'Annabel', 'Caeso'] }) df2 = pd.DataFrame({ '...
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