create table employee

DROP TableName;   MySQL tutorial mysql> CREATE TABLE Employee (    ->     id            int,    ->      first_name    VARCHAR,    ->     last_name     CHAR,    ->     start_date     date,    ->     end_date      Date ,    ->     salary       

SQL syntax BETWEEN ... And operator Determines whether a person's numeric value is within a specific range, and this operator can only be used in SQL statements. Expr[not]between value1 and value2 Expr Specifies the combination of fields and

SQL syntax SQL and database maintenance The establishment of the form After introducing the basic syntax in SQL, but mostly in favor of querying and filtering the database data, in fact, there are many things we can do with SQL commands, and the

MySQL Quick start 1. About MySQL Structured Query Language Structured Query Language SQL standard, managed and maintained by ANSI (American Standards Institute, Core member of ISO). Database vendors support This standard and are expanded.

DatabaseI. Database Overview (! Master)1. Database: Warehouse where data is stored (understanding)Hierarchical database, network-based database, relational databaseInstallation and configuration of 2.MYSQL databaseThe installed path does not have

0. Open mysql\bin\my.ini, look for [mysqld], add a line of text under [Mysqld], Skip-grant-tables is composed of [mysqld] skip-grant-tables "I pass this method once success"Method One: 1, open My.ini file, find Default-storage-engine=innodb this

The right Outer join operator returns each row of the join that satisfies the second (bottom) input for each matching row entered with the first (top) input. In addition, it returns any row in the second input that does not have a matching row in

The order BY statement is used to sort the result set based on the specified columns. The order BY statement sorts the records by default in ascending sequence. If you want to sort records in descending order, you can use the DESC keyword.

Oracle INSERT INTO syntax Basically, there are two ways we can enter the data into the table. One is to enter a pen at a time, the other is to enter several pens at a time. Let's look at a way to enter a pen first. By convention, we'll introduce

11:33 2013/6/26 SQL statement: DML (data manipulation Language) statement: Insert Update Delete SelectDDL (data difinition Language-definition Language) statement: Create table/create database/drop database/alter table DCL (the data Control Lan

Explore the puzzles of Android soft keyboardDelve into Android Async Essentials HandlerThe essential cornerstone of Android's mainstream frameworkStanding on the shoulder of the source code full solution scroller working mechanismAndroid

First, prepare the tableNew TableMysql> CREATE TABLE Department (ID int,Name varchar (20));Mysql> CREATE TABLE Employee (ID int primary KEY auto_increment,Name varchar (20),Sex enum (' Male ', ' female ') not null default ' male ',Age int,dep_id int)

Open database: sudo service mysql start using root login: mysql-u root to create database: creation databases Mysql_shiyan; query database: show databases; connect database: Use Mysql_shiyan; query table: show tables; creating tables: Create TABLE

Data Constraints2.1 What data constraints Constrain the data on the User action table2.2 Default value function: The default value is used when the user does not insert a value into a field that uses the default value .Attention:1) It is possibleto

1.SQL IntroductionStructured Query Language(Hierarchical model, mesh model, relational model)The relational model is the current mainstream (Oralce,mysql MSSQL)SQL Standard: ANSI (1992 1997 2002 ISO)Dialect and SQL standardLearner: SQL

Whether the result value of the expression is within the specified range. Entity SQL between expressions have the same functions as transact-SQL between expressions. ExpressionYou need to test whether any valid expression is within the range defined

The syntax is the same as that for other SQL database tutorials, as shown in the following DELETEFROMCOURSESWHERECOURSE_DESIGNATERJava110 Method for performing complex operations by condition (2006-02-1500: 00: 00, YYYY-MM- The syntax is the same as

The syntax is the same as that of other SQL database tutorials.DELETE FROM COURSESWHERE COURSE_DESIGNATER = 'java110' Complex operations by conditions DELETE FROM CLASSCONVENINGSWHERE CLASSES_NUM_FK> 4AND CLASS_CONVENE_DATE = TO_DATE ('2017-02-15 00:

Oracle partition, index, test (1) ----- insert only this time. See how to insert Fast Preparation SQL code -- data file alter system set db_create_file_dest = 'd: \ toby \ oracle \ data; -- tablespace create tablespace ts_sales_200901 datafile size 5

Mysql operator and function (fat instructor), mysql operator Function Use test;Create table 'Employee '(Emp_no int unsigned,Emp_name varchar (30 ),Emp_sex varchar (3 ),Emp_age tinyint unsigned,Sal double,History datetime);Insert into employee values