hibernate ¶àÌõ¼þ×éºÏ²éѯ Ö® sql Æ´½Ó
public static void main(String[] args) {
Session session = null;
Transaction tx = null;
List list = null;
Criteria criteria = null;
try {
session = HibernateSessionFactory.getSession();
tx = session.beginTransaction();
DetachedCriteria detachedCriteria = DetachedCriteria
.forClass(InfoTab.class);
String sql=" 1=1 ";
Integer pareaId = 0; // ¸¸µØÇø£»
Integer careaId = 0; // ×ÓµØÇø£»
Integer categoryId = 0; // Àà±ð£»
String infoPrivider = "Öнé"; // À´Ô´£»
String houseType= "µØÏÂÊÒ"; // ·¿ÎÝÀàÐÍ£»
Integer hxBedRoom=0; // ÊÒ£»
Integer hxLivingRoom=0; // Ìü£»
String hzHouseStatus="Óз¿³ö×â"; // ºÏ×âÀàÐÍ;
&n
Ïà¹ØÎĵµ£º
http://www.sql-server-performance.com/tips/clustered_indexes_p1.aspx
As a rule of thumb, every table should have a clustered index. Generally, but not always, the clustered index should be on a column that monotonically increases--such as an identity column, or some other column where the value is ......
À´×Ô£ºhttp://www.cnblogs.com/morningwang/archive/2009/01/02/1367277.html
ÓйطÖÒ³ SQL µÄ×ÊÁϺܶ࣬ÓеÄʹÓô洢¹ý³Ì£¬ÓеÄʹÓÃÓαꡣ±¾È˲»Ï²»¶Ê¹ÓÃÓα꣬ÎÒ¾õµÃËüºÄ×Ê¡¢Ð§Âʵͣ»Ê¹Óô洢¹ý³ÌÊǸö²»´íµÄÑ¡Ôñ£¬ÒòΪ´æ´¢¹ý³ÌÊǾ¹ýÔ¤±àÒëµÄ£¬Ö´ÐÐЧÂʸߣ¬Ò²¸üÁé»î¡£ÏÈ¿´¿´µ¥Ìõ SQL Óï¾äµÄ·ÖÒ³ SQL °É¡£
·½·¨1£º
ÊÊÓÃ ......
1¡¢ÏÂÔØ±Ø±¸Èí¼þ
(1) JDK (Java Development Kit)
SUN¹Ù·½µÄÏÂÔØµØÖ·ÊÇhttp://java.sun.com/javase/downloads/index.jsp
(2) JDBC
(3) Eclipse
(4) Microsoft SQL Server 2005 Express£¨µ±È»£¬ÓзÇExpressÒ²OK°¡£©
(5) SQL Server Management Studio
2¡¢°²×°Óë»·¾³ÅäÖÃ
(1) JDK
Ê×ÏÈÔÚWindows»·¾³Ï£¬ÏÂÔØºó° ......
1.×Ö·û´®º¯Êý
³¤¶ÈÓë·ÖÎöÓÃ
datalength(Char_expr) ·µ»Ø×Ö·û´®°üº¬×Ö·ûÊý,µ«²»°üº¬ºóÃæµÄ¿Õ¸ñ
substring(expression,start,length) ²»¶à˵ÁË,È¡×Ó´®
right(char_expr,int_expr) ·µ»Ø×Ö·û´®ÓÒ±ßint_expr¸ö×Ö·û
×Ö·û²Ù×÷Àà
upper(char_expr) תΪ´óд
lower(char_expr) תΪСд
space(int_expr) Éú³Éint_expr¸ö¿Õ¸ñ ......
ÏÂÁÐÓï¾ä²¿·ÖÊÇMssqlÓï¾ä£¬²»¿ÉÒÔÔÚaccessÖÐʹÓá£
SQL·ÖÀࣺ
DDL—Êý¾Ý¶¨ÒåÓïÑÔ(Create£¬Alter£¬Drop£¬DECLARE)
DML—Êý¾Ý²Ù×ÝÓïÑÔ(Select£¬Delete£¬Update£¬Insert)
DCL—Êý¾Ý¿ØÖÆÓïÑÔ(GRANT£¬REVOKE£¬COMMIT£¬ROLLBACK)
Ê×ÏÈ,¼òÒª½éÉÜ»ù´¡Óï¾ä£º
1¡¢ËµÃ÷£º´´½¨Êý¾Ý¿â
Create&nb ......