Here is the PL/SQL Snippet to create and schedule a batch job.
Note : Please test and modify accordingly as per your requirements.
BEGIN
DBMS_SCHEDULER.CREATE_JOB (
job_name => 'MY_BATCH_JOB',
job_type => 'PLSQL_BLOCK',
job_action => 'BEGIN MY_PACKAGE.MY_PROCEDURE; END;',
start_date => SYSTIMESTAMP,
enabled => TRUE
);
END;
Understanding Oracle DBMS_CLOUD Common Packages
Oracle Cloud provides the DBMS_CLOUD package to simplify the integration of cloud-based storage, data loading, and external data access.
This package is useful for managing data in Oracle Autonomous Database and other cloud environments, enabling users to efficiently interact with external cloud services.
The DBMS_CLOUD package is a collection of procedures and functions that help users perform operations such as loading data, managing credentials, and accessing external storage. It eliminates the need for complex scripting and provides secure access to cloud-based resources.
DBMS_CLOUD.CREATE_CREDENTIALThis procedure securely stores cloud service credentials, which are used to authenticate database access to object storage.
BEGIN
DBMS_CLOUD.CREATE_CREDENTIAL(
credential_name => 'my_credential',
username => 'your_username',
password => 'your_password'
);
END;
DBMS_CLOUD.LIST_OBJECTSRetrieves a list of objects from a specified cloud storage bucket.
SELECT * FROM TABLE(DBMS_CLOUD.LIST_OBJECTS(
credential_name => 'my_credential',
location => 'https://objectstorage.region.oraclecloud.com/n/namespace/b/bucket/o/'
));
DBMS_CLOUD.GET_OBJECTDownloads a file from cloud storage into the database directory.
BEGIN
DBMS_CLOUD.GET_OBJECT(
credential_name => 'my_credential',
object_uri => 'https://objectstorage.region.oraclecloud.com/n/namespace/b/bucket/o/sample.csv',
directory_name => 'DATA_PUMP_DIR',
file_name => 'sample.csv'
);
END;
DBMS_CLOUD.COPY_DATALoads data from an external source (such as an object storage CSV file) into an Oracle database table.
BEGIN
DBMS_CLOUD.COPY_DATA(
table_name => 'employees',
credential_name => 'my_credential',
file_uri_list => 'https://objectstorage.region.oraclecloud.com/n/namespace/b/bucket/o/employees.csv',
format => JSON_OBJECT('delimiter' VALUE ',', 'skipheaders' VALUE 1)
);
END;
DBMS_CLOUD.DELETE_CREDENTIALRemoves a stored credential when it is no longer needed.
BEGIN
DBMS_CLOUD.DELETE_CREDENTIAL('my_credential');
END;
Understanding Oracle SQL ID and Its Role in Performance Issues
In Oracle databases, the SQL ID is a fundamental identifier that helps database administrators (DBAs) track and analyze SQL statements. When performance issues arise, SQL IDs can provide critical insights into problematic queries, enabling optimization and troubleshooting.
An SQL ID is a unique identifier assigned to an SQL statement when it is first parsed and stored in the library cache. It remains constant for that particular SQL text, helping DBAs identify and analyze the query’s execution behavior over time.
SQL IDs are vital for performance troubleshooting because they allow DBAs to:
Once you have an SQL ID, you can investigate performance issues using several approaches:
Using the DBMS_XPLAN.DISPLAY_CURSOR function, you can analyze the execution plan to identify inefficiencies such as full table scans, missing indexes, or suboptimal join methods.
SELECT * FROM table(DBMS_XPLAN.DISPLAY_CURSOR('<Your SQL ID>', 0, 'ALL'));
To see historical performance data related to an SQL ID, use:
SELECT * FROM dba_hist_sqlstat WHERE sql_id = <Your SQL ID>
;This helps determine if performance degradation is recent or has been ongoing.
If an SQL statement is currently running and causing performance issues, use:
SELECT sql_id, status, username, sql_text FROM v$session WHERE sql_id = <Your SQL ID>
;This provides information on users executing the query and its current status.
EXEC DBMS_STATS.GATHER_SCHEMA_STATS('your_schema');
V$LOCK and V$SESSION.SQL ID is a powerful tool for diagnosing and resolving performance issues in Oracle databases. By leveraging execution plans, historical data, and session monitoring, DBAs can pinpoint problematic queries and implement optimizations. Regular performance analysis ensures smooth database operations and improved efficiency.
SQL ID is a unique identifier assigned by Oracle to each SQL statement executed in the database. It is essential for performance tuning, troubleshooting, and analyzing query execution plans. In this blog post, we will explore various methods to find the SQL ID in Oracle Developer and SQL*Plus.
Oracle provides the V$SQL view, which contains details about executed SQL statements, including the SQL ID. The following query retrieves the SQL ID for a specific SQL text:
SELECT sql_id, sql_text
FROM v$sql
WHERE sql_text LIKE '%your_query_pattern%';
Replace %your_query_pattern% with a part of your SQL statement to filter the results.
If a query is currently executing, you can find its SQL ID from the V$SESSION view:
SELECT sid, serial#, sql_id, sql_text
FROM v$session s
JOIN v$sql q ON s.sql_id = q.sql_id
WHERE s.status = 'ACTIVE';
This query lists active sessions and their corresponding SQL IDs.
SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null, null, 'ALL'));
Oracle's Automatic Workload Repository (AWR) stores SQL execution history, which is useful when identifying SQL IDs for past queries:
SELECT sql_id, sql_text, elapsed_time_total
FROM dba_hist_sqlstat
ORDER BY elapsed_time_total DESC
FETCH FIRST 10 ROWS ONLY;
This retrieves the top 10 longest-running SQL queries along with their SQL IDs.
Oracle’s Active Session History (ASH) provides detailed SQL execution information:
SELECT sql_id, session_id, sql_text
FROM v$active_session_history
WHERE sample_time > SYSDATE - INTERVAL '10' MINUTE;
This helps track recent SQL statements executed in the database.
Knowing how to find the SQL ID in Oracle is crucial for diagnosing performance issues and analyzing execution plans. Whether using V$SQL, V$SESSION, ASH, or AWR reports, you can quickly locate the SQL ID and use it for further tuning or investigation.