DDL: 数据定义语言 Data Definition LanguageDCL: 数据控制语言 Data Control LanguageDML: 数据操作语言 Data Manipulate LanguageDQL: 数据查询语言 Data Query Language 1.DDL: 数据定义语言 (create、drop) 1.create针对库的操作 1.语法 mysql> help create databaseName: 'CREATE DATABASE'Description:Syntax:CREA...
These commands have far more features than listed above and their specific syntax tends to vary among SQL dialects. If you want to learn more, take ourCreating Database Structuretrack or readWhat Is a SQL Dialect, and Which One Should You Learn?to get a feel of the different SQL implementa...
id int, name varchar, #ERROR 1064 (42000): You have an error in your SQL syntax; birthday date, gender char, weight double(4,1), #-999.9~999.9 score int ); create table stu( id int, name varchar(20), birthday date, gender char, weight double(4,1), #-999.9~999.9 score int );...
SQL, which stands forStructured Query Language, is a powerful language used for managing and manipulating relational databases. In this comprehensive guide, we will delve into SQL commands, their types, syntax, and practical examples to empower you with the knowledge to interact with databases effect...
Syntax: CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name (create_definition,...) 55 [table_option ...] [partition_options] Or: CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name [(create_definition,...)] [table_option ...]
Syntax:TRUNCATE TABLE table_name; Example:TRUNCATE TABLE Employee; The above command will delete the data from the ‘Employee’ table but not the table. 2. Data Manipulation Language: The SQL commands that deal with manipulating data in a database are classified as DML (Data Manipulation Languag...
SQL Syntax DCL Syntax Overview DDL Syntax Overview DML Syntax Overview Other Syntax List A B C D E F G I L M P R S T U V Appendix Best Practices User-defined Functions Stored Procedures Autonomous Transaction System Catalogs and System Views ...
Check the GRANT statement syntax in your system manual for the list of privileges for which your DBMS supports a column list. To let a user see only some of the columns in a table, CREATE a view with only the columns you want the user to see defined, and GRANT SELECT on the view ...
CREATE Command in SQL SQL Create the database or its object (ie table, index, view, function, etc.). Syntax CREATE DATABASE databasename Example CREATE DATABASE Student_data; SQL Copy Syntax CREATE TABLE table_name ( column1 datatype, column2 datatype, column3 datatype, ... ); Examp...
DML is used to manipulate the existing data in the database objects (insert, select, update, delete). DML Commands INSERT SELECT UPDATE DELETE INSERT Syntax INSERTINTOTable_NameVALUES(); SQL Copy Example Here, we are going to insert some values. ...