Useful tips

How do I rename a table in vertica?

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How do I rename a table in vertica?

ALTER TABLE… RENAME TO renames one or more tables. Renamed tables retain their original OIDs.

How do I rename an existing table?

ALTER TABLE table_name RENAME TO new_table_name; Columns can be also be given new name with the use of ALTER TABLE. QUERY: Change the name of column NAME to FIRST_NAME in table Student.

Which is correct syntax of Alter Table?

Syntax. The basic syntax of an ALTER TABLE command to add a New Column in an existing table is as follows. ALTER TABLE table_name ADD column_name datatype; The basic syntax of an ALTER TABLE command to DROP COLUMN in an existing table is as follows.

How do I change the table name in query?

Running The Alter Command

  1. Click the SQL tab at the top.
  2. In the text box, enter the following command: ALTER TABLE exampletable RENAME TO new_table_name;
  3. Replace exampletable with your table’s name and replace new_table_name with the new name for your table.
  4. Click the Go button.

How do I change the schema of a table in Vertica?

Rename any conflicting table or projections that you want to move. Run ALTER TABLE…SET SCHEMA again.

How can I get DDL of a table in Vertica?

The easiest way to get the table definition for a table is by using EXPORT_TABLES() . This function allows multiple objects for the scope. You can script the export statement and execute it inside a script, such as: SELECT ‘SELECT EXPORT_TABLES(””, ”’ || table_schema || ‘.

How do I rename a table in SQL Server?

Using SQL Server Management Studio

  1. In Object Explorer, right-click the table you want to rename and choose Design from the shortcut menu.
  2. From the View menu, choose Properties.
  3. In the field for the Name value in the Properties window, type a new name for the table.

How do I change the schema of a table?

To change the schema of a table by using SQL Server Management Studio, in Object Explorer, right-click on the table and then click Design. Press F4 to open the Properties window. In the Schema box, select a new schema. ALTER SCHEMA uses a schema level lock.

How do I rename multiple tables in Vertica?

You rename multiple tables by supplying two comma-delimited lists. Vertica maps the names according to their order in the two lists. Only the first list can qualify table names with a schema. For example:

How does xvertica map the names of tables?

Vertica maps the names according to their order in the two lists. Only the first list can qualify table names with a schema. For example: The RENAME TO parameter is applied atomically: all tables are renamed, or none of them. For example, if the number of tables to rename does not match the number of new names, none of the tables is renamed.

What happens if I rename a column in a view?

If you rename a column that is referenced by a view, the column does not appear in the result set of the view even if the view uses the wild card (*) to represent all columns in the table. Recreate the view to incorporate the column’s new name.

How does the Vertica tuple mover implement the partition clause?

If you qualify the partition clause with REORGANIZE and the table previously specified no partitioning, the Vertica Tuple Mover immediately implements the partition clause. If the table previously specified partitioning, the Tuple Mover evaluates ROS storage containers and reorganizes them as needed to conform with the new partition clause.

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