How do I get a list of all tables in a database?

How do I get a list of all tables in a database?

Then issue one of the following SQL statement:

1. Show all tables owned by the current user: SELECT table_name FROM user_tables;
2. Show all tables in the current database: SELECT table_name FROM dba_tables;
3. Show all tables that are accessible by the current user:

What is hierarchical table?

A hierarchical database model is a data model in which the data are organized into a tree-like structure. The data are stored as records which are connected to one another through links. A record is a collection of fields, with each field containing only one value.

What is Oracle hierarchical query?

Description of “Figure 9-1 Hierarchical Queries” To find the children of a parent row, Oracle evaluates the PRIOR expression of the CONNECT BY condition for the parent row and the other expression for each row in the table. Rows for which the condition is true are the children of the parent.

How many tables are in a database?

You can create up to 2,147,483,647 tables in a database, with up to 1024 columns in each table. When you design a database table, the properties that are assigned to the table and the columns within the table will control the allowed data types and data ranges that the table accepts.

How to list all tables in Oracle Database?

To list all tables in a Oracle database. select owner,table_name,tablespace_name, from dba_tables; To list all tables accessible to the current user. select owner, tablespace_name, table_name from all_tables; Get list of tables in schema in Oracle.

How to select rows in a hierarchical order?

If a table contains hierarchical data, then you can select rows in a hierarchical order using the hierarchical query clause: START WITH specifies the root row (s) of the hierarchy. CONNECT BY specifies the relationship between parent rows and child rows of the hierarchy.

How does Oracle select children in a hierarchy?

Oracle always selects children by evaluating the CONNECT BY condition with respect to a current parent row. If the query contains a WHERE clause without a join, then Oracle eliminates all rows from the hierarchy that do not satisfy the condition of the WHERE clause.

How to create a hierarchical tree in SQL?

This is the ANSI compliant way to build hierarchies in SQL. It’s composed of two queries. A base query and a recursive one. You use this to define the root rows in your tree. This is like the start with clause in connect by. So to begin the chart with the CEO, use: This maps to the connect by clause.