SHOW
The SHOW keyword provides database and table information.
SHOW DATABASES
Show all databases:
sql
SHOW DATABASES;SHOW DATABASES;sql
+---------+
| Schemas |
+---------+
| public |
+---------+
1 row in set (0.01 sec)+---------+
| Schemas |
+---------+
| public |
+---------+
1 row in set (0.01 sec)Show databases by LIKE pattern:
sql
SHOW DATABASES LIKE 'p%';SHOW DATABASES LIKE 'p%';Show databases by where expr:
sql
SHOW DATABASES WHERE Schemas='test_public_schema';SHOW DATABASES WHERE Schemas='test_public_schema';SHOW TABLES
Show all tables:
sql
SHOW TABLES;SHOW TABLES;sql
+---------+
| Tables |
+---------+
| numbers |
| scripts |
+---------+
2 rows in set (0.00 sec)+---------+
| Tables |
+---------+
| numbers |
| scripts |
+---------+
2 rows in set (0.00 sec)Show tables in the test database:
sql
SHOW TABLES FROM test;SHOW TABLES FROM test;Show tables by like pattern:
sql
SHOW TABLES like '%prometheus%';SHOW TABLES like '%prometheus%';Show tables by where expr:
sql
SHOW TABLES FROM test WHERE Tables='numbers';SHOW TABLES FROM test WHERE Tables='numbers';SHOW FULL TABLES
sql
SHOW FULL TABLES [IN | FROM] [DATABASE] [LIKE pattern] [WHERE query]SHOW FULL TABLES [IN | FROM] [DATABASE] [LIKE pattern] [WHERE query]It will list all tables and table types in the database:
sql
SHOW FULL TABLES;SHOW FULL TABLES;sql
+---------+------------+
| Tables | Table_type |
+---------+------------+
| monitor | BASE TABLE |
| numbers | TEMPORARY |
+---------+------------+
2 rows in set (0.00 sec)+---------+------------+
| Tables | Table_type |
+---------+------------+
| monitor | BASE TABLE |
| numbers | TEMPORARY |
+---------+------------+
2 rows in set (0.00 sec)Tables: the table names.Table_type: the table types, such asBASE_TABLE,TEMPORARY, andVIEWetc.
It supports like and where query too:
sql
SHOW FULL TABLES FROM public like '%mo%';SHOW FULL TABLES FROM public like '%mo%';sql
+---------+------------+
| Tables | Table_type |
+---------+------------+
| monitor | BASE TABLE |
+---------+------------+
1 row in set (0.01 sec)+---------+------------+
| Tables | Table_type |
+---------+------------+
| monitor | BASE TABLE |
+---------+------------+
1 row in set (0.01 sec)sql
SHOW FULL TABLES WHERE Table_type='BASE TABLE';SHOW FULL TABLES WHERE Table_type='BASE TABLE';sql
+---------+------------+
| Tables | Table_type |
+---------+------------+
| monitor | BASE TABLE |
+---------+------------+
1 row in set (0.01 sec)+---------+------------+
| Tables | Table_type |
+---------+------------+
| monitor | BASE TABLE |
+---------+------------+
1 row in set (0.01 sec)SHOW CREATE TABLE
Shows the CREATE TABLE statement that creates the named table:
sql
SHOW CREATE TABLE [table]SHOW CREATE TABLE [table]For example:
sql
SHOW CREATE TABLE system_metrics;SHOW CREATE TABLE system_metrics;sql
+----------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+----------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| system_metrics | CREATE TABLE IF NOT EXISTS `system_metrics` (
`host` STRING NULL,
`idc` STRING NULL,
`cpu_util` DOUBLE NULL,
`memory_util` DOUBLE NULL,
`disk_util` DOUBLE NULL,
`ts` TIMESTAMP(3) NOT NULL DEFAULT current_timestamp(),
TIME INDEX (`ts`),
PRIMARY KEY (`host`, `idc`)
)
ENGINE=mito
WITH(
regions = 1
) |
+----------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------++----------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+----------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| system_metrics | CREATE TABLE IF NOT EXISTS `system_metrics` (
`host` STRING NULL,
`idc` STRING NULL,
`cpu_util` DOUBLE NULL,
`memory_util` DOUBLE NULL,
`disk_util` DOUBLE NULL,
`ts` TIMESTAMP(3) NOT NULL DEFAULT current_timestamp(),
TIME INDEX (`ts`),
PRIMARY KEY (`host`, `idc`)
)
ENGINE=mito
WITH(
regions = 1
) |
+----------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+Table: the table name.Create Table: The SQL to create the table.