Show databases displays all the database name. Support Questions Find answers, ask questions, and share your expertise cancel. SELECT table_name FROM user_tables ORDER BY table_name; Note that this view does not show the OWNER column. Afterward, we can see the list of the tables if we scroll down and select the results tab just after executing the query. Hive is a data warehouse database for Hadoop, all database and table data files are stored at HDFS location /user/hive/warehouse by default, you can also store the Hive data warehouse files either in a custom location on HDFS, S3, or any other Hadoop compatible file systems. Copyright © 2021 SQL Tutorial. Hive Databases provides the facility to store and manage the huge records or datasets on top of a distributed Hadoop platform. Turn on suggestions . SHOW TABLES lists/displays all the base tables and views. Then, issue the following command to show all tables in the current database: If you want to display also the size and description of the tables, you the following command: In SQL Server, you can use the following query to find all tables in the currently connected database: First, connect to a specific database on the DB2 database server: Second, to list all table in the current database schema, you use the following command: To list all tables, you use the command below: To show all tables in the current SQLite database, you use the following command: If you want to query the tables based on a specific pattern e.g., all tables whose names start with test, you use the following command: In this tutorial, you have learned commands to show all tables in a database in various database systems including MySQL, PostgreSQL, Oracle, SQL Server, DB2, and SQLite. Login into Hive Metastore DB and use the database that is used by hive. /tmp/databases) hive -e "show databases;" >> /tmp/databases . If no database is specified then the tables are returned from the current database. Show tables owned by the current user. If you want to learn more about Hive Table Partitions you can check it here . How to code arrows that go from one line to another, Sci-fi film where an EMP device is used to disable an alien ship, and a huge robot rips through a gas station, How to initialize a qubit with a custom state in Qiskit Composer, An infinite group isomorphic to its own automorphism group, but not complete. For the database that has many tables, showing all tables at a time may not be intuitive. SHOW DATABASES lists all of the databases defined in the metastore. The article describes the Hive Data Definition Language(DDL) commands for performing various operations like creating a table/database in Hive, dropping a table/database in Hive, altering a table/database in Hive, etc. First issue the USE command to identify the schema for which you want to viewtables or views. DBA_HIVE_TABLES provides information about all Hive tables in the Hive metastore. Why do we need NMOS transistors for NAND gate? Additionally, the output of this statement may be filtered by an optional matching pattern. For example, from the Databases menu: 1. Select a cluster. The exercise required me to get all columns from all tables in hive for each DB though, and I found that this was not amazingly straight-forward. They went home" mean in Maya Angelou's "They Went Home"? To fetch all the table names from metastore you can use either spark.catalog.listTables() or %sql show tables.If you observe the duration to fetch the details you can see spark.catalog.listTables() usually takes longer than %sql show tables. If you want to see the content in a table, you can use a command: describe table_name; I hope you can see elements inside your table. Hive is used because the tables in Hive are similar to tables in a relational database. If you want to display all the Partitions of a HIVE table you can do that using SHOW PARTITIONS command. To show tables owned by the current user, you query from the user_tables view. Hive maintains all the table metadata in metastore db. SELECT "TBL_NAME" FROM "TBLS" WHERE "OWNER" = 'ownerX'; Then drop them. Each database system has its own command to show all tables in a specified database. You can change the cluster from the Databases menu, create table UI, or view table UI. USER_HIVE_TABLES provides information about all Hive tables owned by the current user in the Hive metastore. In this article, learn how to create a table in Hive and load data. When you use a particular schema and then issue the SHOW TABLES command, Drillreturns the tables and views within that schema. Solved: 'Show tables' displays all the tables within Hive. Then issue one of the following SQL statement: 1) Show all tables owned by the current user: 2) Show all tables in the current database: 3) Show all tables that are accessible by the current user: For PostgreSQL, you can use the psql command-line program to connect to the PostgreSQL database server and display all tables in a database. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. If you are familiar with SQL, it’s a cakewalk. Here you can find the respective SQL command to list all tables in MySQL, PostgreSQL, Oracle, SQL Server, DB2, and SQLite. So today we are going to understand the below topics. This website uses cookies and other tracking technology to analyse traffic, personalise ads and learn how we can improve the experience for our visitors and customers. However, you can list all tables in a database by querying from various data dictionary views. 1- show all tables: SHOW TABLES; get the list and run this query on all tables: DESCRIBE FORMATTED tableX; Then you can get the results and extract the owner, if it's the desired one, drop the table.
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