sql code

SQL code ? 1234567891011121314151617 Create Table MERs (cust_id Int , Cust_name Varchar (10 )) Insert MERs Values (1, 'Craig' ) Insert MERs Values (2, 'John Doe' ) Insert MERs Values (3, 'Jane Doe' )

This post is only for sharing knowledge. It is more concise (that is, a version without English) and will be published on the blog. I am reviewing this article. I hope this post will be helpful for your learning of the LINQ to SQL

Some developers refuse to use the object relationship ing (ORM) technology because of their poor performance experience. Like any form of abstraction, using an ORM framework costs some additional overhead, but in fact, the performance of using

GROUP_CONCAT syntax and instance code syntax: GROUP_CONCAT ([DISTINCT] expr [, expr...] [order by {unsigned_integer | col_name | expr} [ASC | DESC] [, col_name...] [SEPARATOR str_val]) The following shows the function. First, create a

Various Mysql time functions bitsCN.com Various time functions of Mysql Mysql has rich time functions. 1. filtering condition in mysql Query time where the second is not 0 SQL code SECOND (t. file_time) 2. current time SQL code Now () 3. one day

MYSQL subquery and nested query optimization instance parsing, mysql nested instance Parsing Query the highest score of the game history score of 100 SQL code SELECT ps.* FROM cdb_playsgame ps WHERE ps.credits=(select MAX(credits) FROM

Oracle jobs have the scheduled execution function. You can execute tasks at a specified time point or a certain time point every day.   1. query the view for jobs in the query system

The default in the SQL statement is case-insensitive, so the statement: SQL code SELECT * from recenginebizinfo WHERE recenginebizname = ' QQ ' And SQL code SELECT * from recenginebizinfo WHERE recenginebizname = ' QQ ' The results found are the

Methods 1:x:\oracle\ora81\bin\wrap iname=xxx Oname=xxx Method 2:9i uses wrap to encrypt stored procedures under Win2000, 10g can use encrypted packets dbms_ddl.wrap or dbms_ddl.create_wrapped. 11.5.1 uses wrap to encrypt stored procedures under

Brain--Control file The role of the control file Control the contents of a file (1) as shown in Figure 11.1. (2) The General Information tab of the Edit control file appears as shown in Figure 11.2. (3) Figure 11.3 shows the record document Segment

The Oracle job has timed execution and can perform its own tasks at a specified point in time or at some point in the day.First, query the system job, you can query the view --related views SELECT * from Dba_jobs; SELECT * from All_jobs;

The Oracle job has timed execution and can perform its own tasks at a specified point in time or at some point in the day.First, query the system job, you can query the view --related views SELECT * from Dba_jobs; SELECT * from All_jobs;

There are two ways to do a timed mission.One is: Operating system timing, win timed tasks, Unix crontabOne is: database-level timing, she's more efficient,There are a lot of table-level operations, it is recommended to use the database itself job

Original: Oracle job procedure Stored procedure timed taskThe Oracle job has timed execution and can perform its own tasks at a specified point in time or at some point in the day.First, query the system job, you can query the view --related

First, set the initialization parameters job_queue_processesSql> alter system set job_queue_processes=n; (n>0)Job_queue_processes Maximum value is 1000View the job queue background processSql>select name,description from V$bgprocess;or sql>show

Today, we summarize the task Queue Manager for Oracle, which is also easy to query later.There are two ways to do a timed mission.One is: Operating system timing, win timed tasks, Unix crontabOne is: database-level timing, she's more efficient,There

Oracle Knowledge Point-jobOracle The job in crontab is similar to the role of a Linux-A to perform certain operations on a timedRelated views: dba_jobs,user_jobs,all_jobs,dba_jobs_runningRelated parameters:job_queue_processesRelated packages:

another good article:http://www.cnblogs.com/java-pan/archive/2012/09/16/oracle_job.htmlThere are two ways to do a timed mission.One is: Operating system timing, win timed tasks, Unix crontabOne is: database-level timing, she's more efficient,There

We often have complex business logic in project development. By using Oracle's stored procedures, you can significantly reduce the amount of Java program code written and stored procedures executed on the database, so that you can leverage Oracle's

first, the partition table Several categories of partitioned tables:1, Range (range) partitionIs the application of a wide range of table partitioning method, which is the range of the value of the column as a partitioning of the conditions, the