MySQL Describe Table

MySQL is an open–source relational database management system (RDBMS). It is one of the most popular databases globally, known for its reliability, and scalability. MySQL is designed to run on various operating systems, including Windows, Linux, macOS, and more. It is known for its high performance, quick retrieval, and efficient storage. It provides robust security features, including user authentication, access control, and data encryption. In this article, we will understand how to use the DESCRIBE TABLE command using steps to follow, exam ...

MySQL :: MySQL 8.4 Reference Manual :: 15.8.2 EXPLAIN Statement

{EXPLAIN | DESCRIBE | DESC} tbl_name [col_name | wild] {EXPLAIN | DESCRIBE | DESC} [explain... It can contain the SQL % and _ wildcard characters. In this case, the statement displays...

MySQL :: MySQL 8.4 Reference Manual :: 15.8.1 DESCRIBE Statement

The DESCRIBE and EXPLAIN statements are synonyms, used either to obtain information about table structure or query execution plans. For more information, see Section 15.7.7.6, “SHOW...

MySQL :: MySQL 8.4 Reference Manual :: 13.2.2 The DATE, DATETIME, and TIMESTAMP Types

the SQL mode permits this conversion. The precise behavior depends on which if any of strict SQL mode and the NO_ZERO_DATE SQL mode are enabled; see Section 7.1.11, “Server SQL Modes”...

MySQL - DESCRIBE Tables

MySQL - DESCRIBE Tables - Describing a MySQL table refers to retrieving its definition or structure. When we describe a table, it basically includes the fields present, their datatypes, and if any...

MySQL :: MySQL 8.4 Reference Manual :: 14.19.1 Aggregate Function Descriptions

This section describes aggregate functions that operate on sets of values. They are often used with a GROUP BY clause to group values into subsets. Table 14.29 Aggregate Functions Name...

How to use DESCRIBE and EXPLAIN in MySQL? | TablePlus

In MySQL, the DESCRIBE and EXPLAIN statements are synonyms, used either to obtain information about table structure or query execution plans.

MYSQL 문법 - 1 (SHOW / USE / DESCRIBE / SELECT * FROM)

https://www.mysql.com/downloads/ MySQL 사이트에서 설치한 뒤 실행하면 기본적으로 몇몇 테이블들이 들어가 있습니다! SHOW / USE / DESCRIBE / 세미콜론 (;) C언어나 자바처럼 끝에 ;를 붙임으로써 쿼리의 종료를 표현한다. SHOW SHOW는 말그대로 보여주는 명령어이다. SHOW DATABASES; 위와...

MySQL :: MySQL 8.4 Reference Manual :: 14.20.1 Window Function Descriptions

It is part of the SQL standard, but the MySQL implementation permits only RESPECT NULLS (which is also the default). This means that NULL values are considered when calculating results....

MySQL 실행계획(explain) rows, filtered가 제대로 안나오고 1이거나 100.00일때 해결방법

MySQL에서 쿼리 튜닝에 대해 공부하다가, 쿼리와 실행계획을 확인할 때 rows와 filtered값이 제대로 확인되지 않았습니다. rows는 항상 1 filtered는 항상 100.00 때문에 간단하게 발생한 상황과 정확한 값이 나오도록 해결한 방법에 대해 정리합니다. 상황 30만건의 데이터가 있는 사원 테이블이 존재합니다. mysql> descri...