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Practical Oracle SQL: Mastering the Full Power of Oracle Database
To retrieve a list of user tables in Oracle SQL, you can use the following query:
SELECT table_name FROM user_tables;
This query will return a list of all tables owned by the current user in the Oracle database. You can run this query in SQL Developer or any other SQL client connected to your Oracle database to see the user tables. Additionally, you can also use the ALL_TABLES view to view tables accessible to the current user, or the DBA_TABLES view to see all tables in the database, regardless of the owner.
How to get information about user tables in Oracle SQL?
You can get information about user tables in Oracle SQL by querying the USER_TABLES data dictionary view. This view contains information about all tables owned by the currently logged-in user.
You can use the following query to retrieve information about user tables:
SELECT table_name, tablespace_name, num_rows, blocks, avg_row_len FROM user_tables;
This query will return the table name, tablespace name, number of rows, number of blocks, and average row length for each table owned by the current user.
Additionally, you can also query the ALL_TABLES data dictionary view to get information about all tables accessible to the current user, including those owned by other users.
SELECT table_name, owner, tablespace_name, num_rows, blocks, avg_row_len FROM all_tables;
Keep in mind that the information retrieved from these data dictionary views may vary depending on the privileges granted to the current user.
How to get a list of user tables along with their column details in Oracle SQL?
You can use the following query to get a list of user tables along with their column details in Oracle SQL:
SELECT table_name, column_name, data_type, data_length, data_precision, data_scale FROM user_tab_columns
This query will return a list of all user tables along with their columns, data types, data lengths, data precision, and data scale.
What is the command to query all user tables in Oracle SQL?
To query all user tables in Oracle SQL, you can use the following command:
SELECT table_name FROM user_tables;
What is the syntax for querying user tables in Oracle SQL?
To query user tables in Oracle SQL, you can use the following syntax:
SELECT column1, column2, ... FROM table_name;
For example, if you have a table named "customers" with columns "customer_id", "first_name", and "last_name", you can query it as follows:
SELECT customer_id, first_name, last_name FROM customers;