Help Center/CloudTable Service/User Guide/Using ClickHouse/Common SQL Commands for Storage-Compute Coupled ClickHouse/DESC|DESCRIBE TABLE
Updated on 2025-12-29 GMT+08:00
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DESC|DESCRIBE TABLE

This section describes the basic syntax and usage of the SQL statement for querying the table structure in ClickHouse.

Basic Syntax

DESC|DESCRIBE TABLE [database_name.]table [INTO OUTFILE filename] [FORMAT format]

Query the structures of tables demo_t and demo_2 by referring to Creating a Table by Copying the Structure of an Existing Table.

cloudtable-wlr-click-20230730-06-server-1-1 :) desc demo_t;
DESCRIBE TABLE demo_t
Query id: 27a38d90-9459-430f-962e-881817789fc9
┌─name───┬─type───┬─default_type─┬─default_expression─┬─comment─┬─codec_expression─┬─ttl_expression─┐
│ uid    │ Int32  │              │                    │         │                  │                │
│ name   │ String │              │                    │         │                  │                │
│ age    │ UInt32 │              │                    │         │                  │                │
│ gender │ String │              │                    │         │                  │                │
└────────┴────────┴──────────────┴────────────────────┴─────────┴──────────────────┴────────────────┘
4 rows in set. Elapsed: 0.001 sec.
cloudtable-wlr-click-20230730-06-server-1-1 :) desc demo_t2;
DESCRIBE TABLE demo_t2
Query id: 60054fe3-794c-410a-be13-cd0b204a9129
┌─name───┬─type───┬─default_type─┬─default_expression─┬─comment─┬─codec_expression─┬─ttl_expression─┐
│ uid    │ Int32  │              │                    │         │                  │                │
│ name   │ String │              │                    │         │                  │                │
│ age    │ UInt32 │              │                    │         │                  │                │
│ gender │ String │              │                    │         │                  │                │
└────────┴────────┴──────────────┴────────────────────┴─────────┴──────────────────┴────────────────┘
4 rows in set. Elapsed: 0.001 sec.