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This article mainly introduces what is the core sentence in SQL language. It is very detailed and has a certain reference value. Friends who are interested must finish it!

The core statement of the SQL language is the query statement. There are many important statements in SQL, such as [CREATE DATABASE] to create a new database and [ALTER DATABASE] to modify the database.

The core statement of the SQL language is the query statement.

SQL statement is the abbreviation of structured query language Smmure Query Language, and its core is data query.

The most important DDL statement in SQL:

CREATE DATABASE-create a new database

ALTER DATABASE-modify the database

CREATE TABLE-create a new table

ALTER TABLE-change (change) database table

DROP TABLE-Delete the table

CREATE INDEX-create index (search key)

DROP INDEX-Delete the index

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