⑴ sql語句 如何創建一個表啊
創建表的SQL語句根據不同的資料庫會有所不同，常見的幾種資料庫創建方式如下：
創建一個表。表名字Persons，第一列Id_P，整數類型；第二列LASTName，字元類型；第三列FirstName，字元類型。
微軟VS SQL 2008 資料庫
(1)persistedsql擴展閱讀：
結構化查詢語言(Structured Query Language)簡稱SQL，是用於訪問和處理資料庫的標準的計算機語言,同時也是資料庫腳本文件的擴展名。常用的操作：
刪除表-- drop table tabname--這是將表連同表中信息一起刪除但是日誌文件中會有記錄；
刪除資料庫 -- drop database databasename；
刪除數據記錄 -- "delete from 數據表 where 條件表達式"
⑵ sql server 2000 新建表的SQL語句
--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 為表名
create table Table(
欄位名 類型[primary key][not null]
[constrant],
...
...
)
這只是最基本的建表語句，如果其它要求請查看SQL中建表的完整語句。
附SQLServer2005建表完整語句:
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}
}
一個簡單建表例子:
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關鍵字 mssql
PERSISTED
指定 SQL Server 資料庫引擎將在表中物理存儲計算值，而且，當計算列依賴的任何其他列發生更新時對這些計算值進行更新。將計算列標記為 PERSISTED，可允許您對具有確定性、但不精確的計算列創建索引。有關詳細信息，請參閱為計算列創建索引。用作已分區表的分區依據列的所有計算列都必須顯式標記為 PERSISTED。指定 PERSISTED 時，computed_column_expression 必須具有確定性。
⑷ sqlserver2005用語句創建表
當然可以用sql語句建表
create table txxx (col1 int not null,col2 char(30),col3 datetime,...)
詳細的搜索一下create table
⑸ SqlServer如何用Sql語句自定義聚合函數
有兩個寫法：
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簡表的問題
男女兩側的單引號用了漢字的了，改成英文的單引號，下面的也是