If only table data is no longer used, execute theDrop Tablestatement to delete table data in the project. If the project is no longer used, log on to the MaxCompute console and delete the project on theProjectspage. Use Excel to analyze the storage fees of data that is storedless than ...
From the above two images, we can observe that in the TRUNCATE statement, the table structure is preserved; only the data/records in the table have been removed. Whereas in the case of the DROP TABLE statement, the entire table has been removed from the database. Conclusion TRUNCATE TABLE ...
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Use the ALTER TABLE statement to add, alter, or remove a column.RemarksCONTROL permission on current and history tables is required to change schema of temporal table.During an ALTER TABLE operation, the system holds a schema lock on both tables....
Alter Table statement lets you do all this very seamlessly. With Alter Table, you can - Add, modify, or drop a column Add or drop a constraint You can also enable/disable constraints, but that is not in the scope of this tutorial. You will see each of the above use-cases in this ...
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Tip:After you create and load a table, you can add primary key and foreign key constraints to the table with the ALTER TABLE statement to enforce referential integrity. This method is required only for express load mode. If the constraints and indexes are necessary and costly to drop bef...
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TheDBCC DBREINDEXstatement isdeprecated; avoid using it in new applications. DROP INDEXnew heap rebuild (if applicable). Index page deallocation during aDROP INDEXoperation isalwaysfully logged. Expand table TaskArticle Manage the transaction log-Manage the size of the transaction log file ...
The record to be written is wrapped in an If() statement that looks at the VarExpenseMode variable. If the item is New, you would use Defaults('Expense Reports'). However, if the record already exists in your table, you can use VarExpense to update the existing item, because it holds...