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Label PostgreSQL, spatial aggregation, spatial heat map, administrative region, electronic fence background For a certain time interval (or other conditions), how many objects (space point information) appear in some fences and administrative areas (polygon information), and render these polygons by color depth. for example Example 1. Are ...

There are usually many log files in oracle. When encountering an abnormal situation, a large number of logs will be generated, resulting in disk space shortage. Therefore, the corresponding documents need to be cleaned. Including trace file, incident file, listener log file, etc oracle in 11g provides a command-line tool of A ...

concept Nonpartitioned tables can be converted to partitioned tables online. Indexes are maintained as part of this operation and can be partitioned as well. The conversion has no impact on the ongoing DML operations. You can convert non partitioned tables to online partitioned tables. Indexes are maintained as part of the op ...

Connect to Oracle using JDBC Implementation ideas: Use a file named oracle.properties, which contains the Oracle URL, User, Password and driver classes. Through the input stream of ClassLoader, the input stream contains the Oracle connection initialization parameters of the input program. The input stream is loaded in the Properties load. Get t ...

1 Description The reconstruction control file can only be used in case of necessity. It is generally used in the following situations: 1 all current copies of the control file have been lost or are corrupted 2 you are restoring a backup in which the control file is corrupted or missing 3 you need to change a hard li ...

By Daniel gusman BurgosGuan ChanglongOriginal text: https://www.percona.com/blog/... Some people say the best password is one you don't have to remember. The auth? Socket plug-in and MariaDB's UNIX? Socket make this idea possible on MySQL. auth_socket: https://dev.mysql.com/doc/ref... unix_socket: https://mariadb.com/kb/en/lib... Although t ...

1. Import Oracle database data into test library environment 172.15.1.51 root  kic@test 172.15.1.52 root  Generally, the data is imported into the environment of 52 (the configuration is relatively low), and then the data is imported into the environment of 51 (the environment used in this document) [root@NC-TEST ~]# df -h Filesystem ...

After understanding the installation of Oracle 10g and 11g in win10, this article will cover the installation of Oracle 11g in CentOS 7. 1. Preconditions CentOS7 workstation installed jdk8 has been installed 2. Software download Baidu SkyDrive Links: https://pan.baidu.com/s/1u3Qjguim-7Z-4GoHDF8Pxg Extraction code: gwig 3. Co ...

Stored procedures are used to perform specific operations and complete certain functions. They can have input parameters in and output parameters out. Store functions are used to return specific results. Use the return clause at the head of the function, specify the type of return, and use the return clause in the execution part to ...

How many ways to implement multithreading? For the implementation of JAVA multithreading, both online and all kinds of books have the same view, some say two, some say four, we can see many kinds of answers in a glance at Baidu How many are they? Let's look up the JAVA API document: https://docs.oracle.com/javase/9/docs/api/java/lang/Thread.ht ...