SHOW-COLUMN-STATS

SHOW-COLUMN-STATS

Name

SHOW COLUMN STATS

Description

Use SHOW COLUMN STATS to view various statistics data for columns.

Syntax:

SHOW COLUMN [cached] STATS table_name [ (column_name [, ...]) ];

Where:

• cached: Show statistics information in the current FE memory cache.
• table_name: The target table for collecting statistics. It can be in the format db_name.table_name.
• column_name: Specifies the target column, which must be an existing column in table_name. You can specify multiple column names separated by commas.

Here's an example:

mysql> show column stats lineitem(l_tax)\G;
*************************** 1. row ***************************
  column_name: l_tax
        count: 6001215.0
          ndv: 9.0
     num_null: 0.0
    data_size: 4.800972E7
avg_size_byte: 8.0
          min: 0.00
          max: 0.08
       method: FULL
         type: FUNDAMENTALS
      trigger: MANUAL
  query_times: 0
 updated_time: 2023-11-07 11:00:46

Keywords

SHOW, TABLE, STATS