hql requirements

Hibernate.cfg.xml configuration: 　　Hibernate---HQL query 2---

1 , basic query 1, non-conditional query 2. Query with conditions 3, through the parameters of the query 4. Query by named parameters 5. Querying empty elements 2 , common query 1. List query (in ()) 2. Projection Query 3, projection of an element query ( NOTE: You cannot use SELECT * to query ) 4. Other types of projection 5. Single element query (Uniqueresult) 6, paging query 3 , Object-based queries, and SQL Native Query There is also an object-based query in hibernate Queries can

= N.ASQBHWHEREN.ACLLX = ' 1 'And M.DFKRQ is not NULLAnd not EXISTS(SELECT1FromTinfo_insurance_policy PWHEREN.ASQBH = P.ASQBH)UNIONSELECTM.ASQBH,M.ASQLX,Case M.ASQLXWhen ' 1 'Then I.AKHXMWhen ' 2 'Then I.AQYMC2ELSE 'END as AKHXM,M.aczry,I.ASJHM,N.ACLLX,M.ACPFAMC,M.dsctjrqFromLb_apply_car_invoice TLeft JOINLb_apply_main mOnM.ASQBH = T.ASQBHLeft JOINLb_apply_car NOnN.ASQBH = T.ASQBHLeft JOINLb_apply_lessee_info IOnM.ASQBH =I.ASQBHWHERET.ACLFPH is NULLAnd M.DFKRQ is not NULLand n.acllx = ' 1 ')WHER

HQL operation1. Distribute byDistribute by Col Scatter data across Col columns to different reduceSortSort by col sorts data according to Col columnSelect COL,CO2 from table_name distribute by col1 Sort by col1Asc,col2 desc;The combination of both ensures that the output of each reduce is orderlyApplication Scenarios:* The file size of map output is not uniform* Reduce output file size is not uniform* Too many small files* File size is very large2. Cl

1. the query result is part of the table field, not all Ad is a couponad object Coupon is an attribute of AD and also an entity class. Select ad. Coupon from couponad ad where ad. Deleted = false order by createddate DESC 2. Like Fuzzy search Here, the variable key is of the string type. String hql = "from Coupon coupon where coupon.deleted=false and coupon.name like :key"; Map 3. Total number of queries public int getTotalCou

An error is reported when Java applications are deployed in weblogic10.3. Org. hibernate. queryexception: classnotfoundexception: org. hibernate. hql. Ast. hqltoken Solution: Go to the Weblogic installation directory and modify the parameter pre_classpath (in red) in the setdomainenv. Sh file) [Root @ localhost bin] # cd/BEA/WebLogic/user_projects/domains/mydomain/bin[Root @ localhost bin] # lsNodemanager server_migration service_migration setdo

'foo', 69, '2017-01-01 10:00:01. 0' Java public static final constants eg. Color. TABBY I don't have to explain anything else. Here I just want to explain the parameters in the query:We know that when passing parameters in SQL for query, we usually use PreparedStatement to write a lot of "?" In the statement,This method can also be used in hql, for example:List mates = sess. find ("Select employee. name from Employee as employee" +"Where employee. Na

In WebLogic, you want to create a new domain to deploy a demo environment. However, when the new domain is started, an exception hibernate. hql. Ast. hqltoken is reported as soon as the project is accessed, and the service is terminated, I checked it online. Http://www.24xuexi.com/w/2011-05-03/89204.html Two jar packages under Bea \ modules conflict with the jar (antlr-2.7.6.jar) package in the project to delete the jar package in weblogic10.3(CO

Dao -------------------------------------------------------------------------- /*** Return the required property value ** @ return returns a set */@ suppresswarnings ("unchecked") public list ------------------------------------------------------------------------- TestCode(Service layer omitted) Ignore )--------------------------------------------------------------------------------------------------------- // Some attributes are returned through h