This section describes the Spark SQL syntax list provided by DLI. For details about the parameters and examples, see the syntax description.
When working with SQL Server, sometimes there is a need to create new tables to accomplish a task. Most of the data you need probably already exists in the database, but you may need to create a new table to import data or create a new table as a subset of other tables. In this a...
Data definition language (DDL) is used to define or modify an object in a database, such as a table, index, or view.GaussDB(DWS) does not support DDL if its CN is unavail
In this case (assuming you can't migrate to SQL Server), you should at least archive the old data rather than deleting them permanently. Simply create an empty copy of your table, insert the old records into that, then delete them from your original table. If there are related records ...
Be careful, deleting a database would loss all the data stored in the database.Create TableThe CREATE TABLE statement is used for creating a new table. The syntax is −SQL> CREATE TABLE table_name ( column_name column_data_type, column_name column_data_type, column_name column_data_...
Flush Plugin's cache ( deleting bothJIRA_HOME/.bundled-pluginsandJIRA_HOME/.osgi-pluginsdirectories ) Deleting all rows inpluginstatetable Restart; Full Re-index; Database Integrity Checker; Cause It has been known to...
SQL CREATE INDEX Statement To create an index on a database table, SQL provides the CREATE INDEX statement. Following is the syntax −CREATE UNIQUE INDEX index_name ON table_name ( column1, column2,...columnN); Let us create an index for the column named 'NAME' in the existing CUSTOM...
A table in your own schema A view in your own schema A private synonym for a table or view A public synonym Oracle always attempts to resolve an object reference within the namespaces in your own schema before considering namespaces outside your schema. In this example, Oracle ...
When SQL EXISTS Should Be Used? The following situations make the EXISTS condition especially helpful. Verifying Data Existence: Before carrying out an action (such as choosing, updating, or deleting data), you can use EXISTS to see if related data is present in another table. Performance: Beca...
Handling multiple MySql queries (Deleting and Copy) Good morning. I have a table on MySQL DataBase. In this table there are 5 robots that can write like 10 record each per hour. Every 3 month a script that I have created, make a copy of the table and t......