SELECT * FROM sys. dba_tab_privs WHERE grantee=’PUBLIC’; The ADMIN or SELECT ANY TABLE privilege is required to access other system tables and views.
What are the system tables?
System tables in SQL Server contain the all-important meta data, the data about your data. This data includes information about table names, column names, and data types, so that SQL Server can properly process queries and return result sets.
What is system table in database?
System Tables with Information About Database Objects The database system contains a series of system tables with information about the database objects and their relationships to each other. You have to specify the schema to access these tables in every SQL mode other than INTERNAL.
How do you use exists?
Use EXISTS to identify the existence of a relationship without regard for the quantity. For example, EXISTS returns true if the subquery returns any rows, and [NOT] EXISTS returns true if the subquery returns no rows. The EXISTS condition is considered to be met if the subquery returns at least one row.
How do I list all the tables in a schema?
All Database Tables If you want to list all tables in the Oracle database, you can query the dba_tables view. SELECT table_name FROM dba_tables ORDER BY table_name ASC; This view (and all others starting with dba_) are meant for database administrators.
What are Oracle user tables?
USER_TABLES describes the relational tables owned by the current user. Its columns (except for OWNER ) are the same as those in ALL_TABLES . To gather statistics for this view, use the ANALYZE SQL statement.
What is SYS and system in Oracle?
1 SYS and SYSTEM Users. The following administrative user accounts are automatically created when you install Oracle Database. They are both created with the password that you supplied upon installation, and they are both automatically granted the DBA role. SYS. This account can perform all administrative functions.
Which database contains system tables?
Msdb Database: This is one of the system databases that play an important role in SQL server’s management and maintenance. It contains some system defined tables that are specific to this database only.
How do I list all columns in a table in SQL?
Lets assume our table name is “Student”.
- USE MyDB.
- GO.
- SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = N’Student’
- GO.
- EXEC sp_help ‘Student’
- GO.
- select * from sys.all_columns where object_id = OBJECT_ID(‘Student’)
- GO.
How do I get a list of table names in SQL database?
1 Answer
- SELECT TABLE_NAME.
- FROM INFORMATION_SCHEMA.TABLES.
- WHERE TABLE_TYPE = ‘BASE TABLE’ AND TABLE_SCHEMA=’dbName’
What is difference between in and exists in SQL?
Key differences between IN and EXISTS Operator The IN clause scan all records fetched from the given subquery column, whereas EXISTS clause evaluates true or false, and the SQL engine quits the scanning process as soon as it found a match.
What are the Oracle system tables?
A table is the basic unit of data storage in an Oracle database. The tables of a database hold all of the user accessible data. Table data is stored in rows and columns. (Continued on next question…)
What are external tables in Oracle?
The Oracle external tables feature allows us to access data in external sources as if it is a table in the database. External tables are read-only. No data manipulation language (DML) operations is allowed on an external table. An external table does not describe any data that is stored in the database.
How do you describe a table in Oracle?
Oracle has a set tables containing meta data about the database structure. There is a table of tables. A table of views. A table of columns. You can query these tables by using views such as USER_TABLES (tables in your schema), ALL_TABLES (tables you have permission to view), DBA_TABLES (all tables, if you have the privileges).
How to get table name from oracle query?
You can still get the table name by looking at user_indexes. Do an explain plan on the query. The object name will then be in the OBJECT_NAME column in your PLAN_TABLE. But the object name might be a table or index, so you’ll need to join that name to user_objects to see if it’s a table or index name.
