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  HBase API operation example

  Package com.test.hbase.api;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.hbas

  2022-06-01 09:20:15 Views: 283
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  Gerrit building

  Gerrit web Building Manual installation openjdk installation apt-get install openjdk-7-jdk installation apache2# apt-get install apache2 installation PostgreS installation

  2022-06-01 09:20:15 Views: 248
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  Tablespace usage script in oracle

  Select a.tablespace_name "tbsname", 100-round ((nvl (b.bytesencrypted freegrahy 0) / a.bytes_alloc) * 100pr 2) "ratio", rou

  2022-06-01 09:20:15 Views: 204
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  Oracle lock summary

  "oracle lock" in the database must know a few points: 1, transactions are the core of the database, they are good things 2, should be delayed until the appropriate time to commit. Do not commit too quickly to avoid putting pressure on the system, because even if the transaction is very long or large, it is generally not built on the system.

  2022-06-01 09:20:15 Views: 271
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  Part of the groovy usage record of soapUI+groovy interface testing

  1, write the value (30,031), update to multiple records of the data table. SqlStr = "select column_id from 1dcq_shop_column2 where shop_id ='" + db_Sh

  2022-06-01 09:20:14 Views: 274
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  MySQL Select Database

  MySQL Select Database after you connect to the MySQL database, there may be multiple databases that can be operated, so you need to select the database you want to operate on. Selecting a MySQL database from the command prompt window makes it easy to select a specific in the mysql > prompt window

  2022-06-01 09:20:14 Views: 242
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  SQLite lesson 1 sqlite3.exe usage tutorial

  1) .open Open database example: sqlite > .open test.db Note: > later point 2) .tables to view the table names contained in the database example: sqlite > .tables Note: > later point 3) .sche

  2022-06-01 09:20:14 Views: 231
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  Exploration of the possibility of SQL SERVER Undelete (1) Clustered Table

  In SQLSERVER, if the data is deleted by mistake, according to the official statement, SQLSERVER does not have undelete. The most typical way to save deleted data is to restore the backup file to another DB, retrieve the data from another DB, and then add

  2022-06-01 09:20:09 Views: 215
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  What are the methods of optimizing database by php

  This article uses easy-to-understand examples to introduce the methods of php to optimize the database, the code is very detailed, interested friends can refer to, hope to be helpful to you. The methods of php optimizing database: 1, selecting the most suitable field properties; 2, using connection JOI

  2022-06-01 09:20:09 Views: 274
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  Talking about DB2 Zos-DB2 LUW VS DB2 Zos

  DB2 Zos talk-DB2 LUW VS DB2 Zos Overview: you may know more about DB2 LUW, but little about DB2 Zos (mainframe operating system), because the internal information of IBM has always been relatively closed, especially in

  2022-06-01 09:19:58 Views: 264
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  Mysql query log count statistics

  Analyze and count MySQL general logs to find the SQL with the most queries. When we need to optimize MySQL queries, the first thought is to turn on slow logs. Slow logs can see SQL statements that take more than a certain amount of time to execute and SQL that do not use indexes. But if we want to,

  2022-06-01 09:19:58 Views: 277
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  About Oracle VM VirtualBox accessing Local area Network

  Oracle VM VirtualBox, which seems to be useless, may be a little strange, but everyone is very familiar with VMware Workstation\ VMWareESXi. Because we usually use too much. The relative function is here

  2022-06-01 09:19:57 Views: 262
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  Posgresql auto_explain extended referenc

  Auto_explain can define the execution time of sql to record in the log in postgres, including the direct plan of sql. It can be said to be a very useful tool for online optimization, combined with pg_stat_statements and log_m.

  2022-06-01 09:19:57 Views: 237
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  Oracle rac lie notes 2016-4-22

  Check the command crsctl check crsolsnodescrs_stat-t cluster classification after successful installation of CRS software: high performance computing cluster (distributed), load balancing cluster (LB), high availability cluster (HA) FAQ: concurrency control, amnesia

  2022-06-01 09:19:57 Views: 276
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  What should you pay attention to when migrating mysql to 8.0?

  This article mainly shows you what you should pay attention to when mysql migrates to 8.0, the content is simple and easy to understand, I hope you can learn, there will be gains after learning, let's take a look at it. Password mode PDO::__construct ():

  2022-06-01 09:19:57 Views: 237
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  Chapter 1: select statement of oracle_sql statement

  Which tables do scott users have? SQL > select * from tab; queries all rows and columns in the table SQL > select * from dept;SQL > select * from emp; saves the buffer command as

  2022-06-01 09:19:57 Views: 225
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  MySQL-binlog operation and recovery

  Binlog is enabled and viewed: > show variables like 'log_bin'; # to see if it is enabled > set sql_log_bin=1 | | set sql_log_bin=0; # enabled |

  2022-06-01 09:19:56 Views: 276
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  Ogg startup error libnnz11.so: cannot open shared object file

  When the ogg software is unzipped and given the correct permissions, you will encounter the following error when starting ogg: [root@HWZX-DB-BI ogg] # / ggsci./ggsci: error while loading shared

  2022-06-01 09:19:56 Views: 246
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  Modify AWR collection intervals and manually create or delete AWR collections

  -- the default AWR is executed every hour, and SQL > select * from dba_hist_wr_control;DBID SNAP_INTERVAL RETENTION TOPNSQL C is retained for 8 days.

  2022-06-01 09:19:56 Views: 257
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  How to build mysql5.7.29 by centos7 in linux

  This article mainly explains how to build mysql5.7.29 in centos7 in linux, the content is clear, interested friends can learn, I believe it will be helpful after reading. 1. Download mysql2. Management group and directory permissions 2.1 decompress m

  2022-06-01 09:19:26 Views: 208