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Create Jobs Syntax: Jobs are created using the DBMS_SCHEDULER package, which is the CREATE_JOB process. For example: SQL>BEGIN 2 DBMS_SCHEDULER.CREATE_JOB ( 3 job_name =>'Insert _ TEST_TBL', 4 job_type =>'Stored _ PROCEDURE', 5 job_action =>'P

After MYSQL exports an SQL statement: DELIMITER $ Drop trigger if exists 'updateegopriceondelete' $ CREATE TRIGGER 'updateegopriceondelete' after delete on 'mermerinfo' FOR EACH ROW BEGIN Delete from egoprice WHERE customerId = OLD. customerId; END $

1.DAYOFWEEK (date), which returns the data time of the week (1 => Sunday, 2 => Monday, 3 => Tuesday, ..., 7 => Saturday). Mysql> Select DayOfWeek (' 2013-06-09 14:00:00 ');+----------------------------------+| DayOfWeek (' 2013-06-09 14:00:00 ') |+-

After MySQL exports one sql: DELIMITER $$ DROP TRIGGER IF EXISTS ' Updateegopriceondelete ' $$ CREATE TRIGGER ' Updateegopriceondelete ' after the DELETE on ' CustomerInfo ' For each ROW BEGIN DELETE from Egoprice WHERE

MySQL page access statistics and ranking situation Count the number of pages visited to rank by resolution SELECT CONCAT (' height ', ' * ', ' width ') as ' resolution ', COUNT (CONCAT (' height ', ' * ', ' width ')) as ' total ' from '

Select Curdate (); --Get the current dateSelect Last_day (Curdate ()); -Get the last day of the month.Select Date_add (Curdate (), Interval-day (Curdate ()) +1 day); -Get the first day of the monthSelect Date_add (Curdate ()-day (Curdate ())

The following article is mainly to describe what is the role of delimiter in MySQL database? We generally think that this command is not related to stored procedures, is this the case? The following articles will give you the relevant knowledge,

The interviewer asked me about Oracle's architecture a few days ago, and let me draw it on a blank sheet of paper. Looking back at that time answer is also good, most of the content is described, hehe, just saw an article on the internet to explain

General Idea:MySQL does not have a convenient statistical function like Oracle, can only rely on their own hard computing: through the Time field directly increase the year, the month, and then through the left join associated Time field to

11. Check to see if Evevt is turned on and on Evevt. 2 31.1, MySQL evevt feature is turned off by default, you can use the following statement to see the state of evevt, if it is off or 0, the expression is closed. 4Show VARIABLES like '%sche% ';51.2

The contents of this chapter include: Processes and stores a specific date and time. The date type can store century, 4-bit years, months, days, hours, minutes, and seconds With timestamp timestamp, the timestamp can store a specific

The following 4 SQL, which is obviously a 2-class SQL statement. May 19, 2017Question: Walked two times the full table.Select COUNT (*) active merchant number from (select Merchant_code,count (DISTINCT concat (Merchant_code,date (create_date)))

I. Introduction of SysbenchSysbench is a modular, cross-platform, multi-threaded benchmarking tool designed to evaluate the load of databases under different system parameters. It mainly includes testing in the following ways:1. CPU Performance2.

MySQL Common functions1, the database to take yesterday's dateMysql> Select Date_sub (current_date (), Interval 1 day); +-----------------------------------------+| Date_sub (Current_date (), Interval 1 day) |+----------------------------------------

　 Oracle Mysql Compare versions Release 10.2.0.1.0 XE windowsxp 5.0.45-community-nt-log MySQL Community Edition (GPL) As a calculator Sql> Select from dual; Mysql> Select; Mysql>

What is the role of delimiter in MySQL?This command doesn't have anything to do with stored procedures.In fact, just tell the MySQL interpreter if the command is over and MySQL can execute it.By default, delimiter is a semicolon;。 In the

Today took time to collate a MySQL in the days, weeks, months of time data related to the SQL statement of the various writing, part of the collection of information, all hand-finishing, their own learning at the same time, share to everyone, and

The previous article has adjusted the single redo statement to the optimal, but the statement is executed in one-threaded fashion. Can the multi-processor be used to allow multi-threading to be executed in parallel to further improve speed? For

#当月每天负毛利订单明细SELECTc.id,a.city,a.username,a. Order date, A. Order number, A. Sales confirmation, a. Cost amount, a. Gross profit of 1, Case whenA. Gross Profit 10 Then"negative margin" whenA. Gross Profit 1=0 Then"negative margin" whenA. Gross

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