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How do I show tables in Hive database?
Switch to the Hive schema and issue the SHOW TABLES command to see the Hive tables that exist. Switch to the HBase schema and issue the SHOW TABLES command to see the HBase tables that exist within the schema.
How do I SELECT a table name from a schema?
Using the Information Schema
- SELECT TABLE_NAME FROM INFORMATION_SCHEMA. TABLES.
- SELECT TABLE_NAME, COLUMN_NAME FROM INFORMATION_SCHEMA. COLUMNS.
- SELECT COLUMN_NAME FROM INFORMATION_SCHEMA. COLUMNS WHERE TABLE_NAME = ‘Album’
- IF EXISTS( SELECT * FROM INFORMATION_SCHEMA.
- IF EXISTS( SELECT * FROM INFORMATION_SCHEMA.
How do I find a column in all tables in Hive?
I ran this query in hive: select table_name,column_name from retail. columns where column_name like ‘%emp%’; (retail is a database). I tried query: select distinct table_name from default. columns where column_name = ’emp’ (default is mine database).
What is the default location for Managed tables in a Hive?
Managed tables A managed table is stored under the hive. metastore. warehouse. dir path property, by default in a folder path similar to /user/hive/warehouse/databasename.
How to get the schema of a table?
Gets the schema to use in create/alter commands and additional table metadata. Requires Database user permission. The name of the table. Gets the schema in JSON format and additional table metadata. Requires Database user permission.
What does the show Tables command do in SQL?
SHOW TABLES Description Lists the tables for which you have access privileges, including dropped tables that are still within the Time Travel retention period and, therefore, can be undropped. The command can be used to list tables for the current/specified database or schema, or across your entire account. SHOW TABLES command Syntax
How to see table schemas in Apache Drill?
Complete the following steps to see views that exist in a file system and tables that exist in Hive and HBase data sources: Issue the SHOW SCHEMAS command to see a list of available schemas.
What happens if schema is specified without a name?
If DATABASE or SCHEMA is specified without a name and the session does not currently have a database in use, the parameter has no effect on the output. If SCHEMA is specified with a name and the session does not currently have a database in use, the schema name must be fully qualified with the database name (e.g. testdb.testschema ).