What is explain select?

What is explain select?

The EXPLAIN statement provides information about how MySQL executes statements: EXPLAIN works with SELECT , DELETE , INSERT , REPLACE , and UPDATE statements. For SELECT statements, EXPLAIN produces additional execution plan information that can be displayed using SHOW WARNINGS . See Section 8.8.

What is explain in query?

The EXPLAIN keyword is used throughout various SQL databases and provides information about how your SQL database executes a query. Instead of the usual result output, MySQL would then show its statement execution plan by explaining which processes take place in which order when executing the statement.

What is explain SQL?

Basically, SQL stands for Structured Query Language which is basically a language used by databases. This language allows to handle the information using tables and shows a language to query these tables and other objects related (views, functions, procedures, etc.). With SQL you can insert, delete, and update data.

What type of word is explain?

Explain is a verb – Word Type.

What is extra in explain MySQL?

The Extra column of EXPLAIN output contains additional information about how MySQL resolves the query. The following list explains the values that can appear in this column. Each item also indicates for JSON-formatted output which property displays the Extra value. For some of these, there is a specific property.

What is describe in MySQL?

MySQLMySQLi Database. The MySQL’s DESCRIBE or DESC both are equivalent. The DESC is the short form of DESCRIBE command and used to dipslay the information about a table like column names and constraints on column name. The DESCRIBE command is equivalent to the following command − SHOW columns from yourTableName command …

What is query explain with example?

Query is another word for question. In fact, outside of computing terminology, the words “query” and “question” can be used interchangeably. For example, if you need additional information from someone, you might say, “I have a query for you.” In computing, queries are also used to retrieve information.

What is explain statement in MySQL?

The EXPLAIN statement provides information about how MySQL executes statements: EXPLAIN works with SELECT , DELETE , INSERT , REPLACE , and UPDATE statements. That is, MySQL explains how it would process the statement, including information about how tables are joined and in which order.

What is SQL and its type?

SQL stands for Structured Query Language, as it is the special purpose domain-specific language for querying data in Relational Database Management System (RDBMS). Microsoft SQL Server, MySQL, Oracle, etc. use SQL for querying with slight syntax differences.

Why is it called SQL?

SQL stands for “Structured Query Language”. Raymond Boyce and Donald Chamberlin developed SQL at IBM in the early 1970s. Initially, it was called SEQUEL (Structured English Query Language) but later needed to change its name because another business claimed that name as a trademark.

What is explain noun?

noun. \ ˈnau̇n \ Essential Meaning of noun. : a word that is the name of something (such as a person, animal, place, thing, quality, idea, or action) and is typically used in a sentence as subject or object of a verb or as object of a preposition.

What is the spiritual meaning of 1?

Number 1 . . . Spiritual Meaning of number One. . . 1 is a strong assertive symbol of individuality, the beginning of self discovery and self empowerment. One is the spiritual essence of singularity, seeking, reaching, exploring to define self.

What does the number 1 mean?

Number 1. The Number 1 suggests a strong sense of independence, desire to excel and to lead. It is the most ambitious number and can bring those who identified with it to the greatest heights.

What is the definition of one?

Definition of one. 1 : being a single unit or thing one day at a time She is one year old. 2a : being one in particular early one morning The Grand Canyon is one place I’d like to visit.

What does number one mean?

1. a reference to yourself or myself etc.; ‘take care of number one’ means to put your own interests first. 2. the first or highest in an ordering or series.