⑴ sql语句 如何创建一个表啊
创建表的SQL语句根据不同的数据库会有所不同，常见的几种数据库创建方式如下：
创建一个表。表名字Persons，第一列Id_P，整数类型；第二列LASTName，字符类型；第三列FirstName，字符类型。
微软VS SQL 2008 数据库
(1)persistedsql扩展阅读：
结构化查询语言(Structured Query Language)简称SQL，是用于访问和处理数据库的标准的计算机语言,同时也是数据库脚本文件的扩展名。常用的操作：
删除表-- drop table tabname--这是将表连同表中信息一起删除但是日志文件中会有记录；
删除数据库 -- drop database databasename；
删除数据记录 -- "delete from 数据表 where 条件表达式"
⑵ sql server 2000 新建表的SQL语句
--if exists(select name from sysobjects where name='Table' and xtype='p')
if exists (select * from sysobjects where id = object_id(N'Table') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table Table --Table 为表名
create table Table(
字段名 类型[primary key][not null]
[constrant],
...
...
)
这只是最基本的建表语句，如果其它要求请查看SQL中建表的完整语句。
附SQLServer2005建表完整语句:
CREATE TABLE
[ database_name . [ schema_name ] . | schema_name . ] table_name
( { <column_definition> | <computed_column_definition> }
[ <table_constraint> ] [ ,...n ] )
[ ON { partition_scheme_name ( partition_column_name ) | filegroup
| "default" } ]
[ { TEXTIMAGE_ON { filegroup | "default" } ]
[ ; ]
<column_definition> ::=
column_name <data_type>
[ COLLATE collation_name ]
[ NULL | NOT NULL ]
[
[ CONSTRAINT constraint_name ] DEFAULT constant_expression ]
| [ IDENTITY [ ( seed ,increment ) ] [ NOT FOR REPLICATION ]
]
[ ROWGUIDCOL ] [ <column_constraint> [ ...n ] ]
<data type> ::=
[ type_schema_name . ] type_name
[ ( precision [ , scale ] | max |
[ { CONTENT | DOCUMENT } ] xml_schema_collection ) ]
<column_constraint> ::=
[ CONSTRAINT constraint_name ]
{ { PRIMARY KEY | UNIQUE }
[ CLUSTERED | NONCLUSTERED ]
[
WITH FILLFACTOR = fillfactor
| WITH ( < index_option > [ , ...n ] )
]
[ ON { partition_scheme_name ( partition_column_name )
| filegroup | "default" } ]
| [ FOREIGN KEY ]
REFERENCES [ schema_name . ] referenced_table_name [ ( ref_column ) ]
[ ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ]
[ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ]
[ NOT FOR REPLICATION ]
| CHECK [ NOT FOR REPLICATION ] ( logical_expression )
}
<computed_column_definition> ::=
column_name AS computed_column_expression
[ PERSISTED [ NOT NULL ] ]
[
[ CONSTRAINT constraint_name ]
{ PRIMARY KEY | UNIQUE }
[ CLUSTERED | NONCLUSTERED ]
[
WITH FILLFACTOR = fillfactor
| WITH ( <index_option> [ , ...n ] )
]
| [ FOREIGN KEY ]
REFERENCES referenced_table_name [ ( ref_column ) ]
[ ON DELETE { NO ACTION | CASCADE } ]
[ ON UPDATE { NO ACTION } ]
[ NOT FOR REPLICATION ]
| CHECK [ NOT FOR REPLICATION ] ( logical_expression )
[ ON { partition_scheme_name ( partition_column_name )
| filegroup | "default" } ]
]
< table_constraint > ::=
[ CONSTRAINT constraint_name ]
{
{ PRIMARY KEY | UNIQUE }
[ CLUSTERED | NONCLUSTERED ]
(column [ ASC | DESC ] [ ,...n ] )
[
WITH FILLFACTOR = fillfactor
|WITH ( <index_option> [ , ...n ] )
]
[ ON { partition_scheme_name (partition_column_name)
| filegroup | "default" } ]
| FOREIGN KEY
( column [ ,...n ] )
REFERENCES referenced_table_name [ ( ref_column [ ,...n ] ) ]
[ ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ]
[ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ]
[ NOT FOR REPLICATION ]
| CHECK [ NOT FOR REPLICATION ] ( logical_expression )
}
<index_option> ::=
{
PAD_INDEX = { ON | OFF }
| FILLFACTOR = fillfactor
| IGNORE_DUP_KEY = { ON | OFF }
| STATISTICS_NORECOMPUTE = { ON | OFF }
| ALLOW_ROW_LOCKS = { ON | OFF}
| ALLOW_PAGE_LOCKS ={ ON | OFF}
}
一个简单建表例子:
CREATE TABLE films (
code char(5) CONSTRAINT firstkey PRIMARY KEY,
title varchar(40) NOT NULL,
did integer NOT NULL,
date_prod date,
kind varchar(10),
len interval hour to minute
);
⑶ persisted关键字 mssql
PERSISTED
指定 SQL Server 数据库引擎将在表中物理存储计算值，而且，当计算列依赖的任何其他列发生更新时对这些计算值进行更新。将计算列标记为 PERSISTED，可允许您对具有确定性、但不精确的计算列创建索引。有关详细信息，请参阅为计算列创建索引。用作已分区表的分区依据列的所有计算列都必须显式标记为 PERSISTED。指定 PERSISTED 时，computed_column_expression 必须具有确定性。
⑷ sqlserver2005用语句创建表
当然可以用sql语句建表
create table txxx (col1 int not null,col2 char(30),col3 datetime,...)
详细的搜索一下create table
⑸ SqlServer如何用Sql语句自定义聚合函数
有两个写法：
select*fromtblDept
whereidin(
count(casewhenSalary>3000then1elsenullend)*1.0/count(*)>0.5)
或
select*fromtblDept
whereidin(
sum(casewhenSalary>3000then1else0end)*1.0/count(*)>0.5)
⑹ sql server简表的问题
男女两侧的单引号用了汉字的了，改成英文的单引号，下面的也是