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  Mysql generates random numbers

  DROP FUNCTION IF EXISTS rand_string;delimiter / / CREATE FUNCTION rand_string (l_num tinyint UNSIGNED,l

  2022-06-01 05:04:48 Views: 260
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  DBCC-Undocumented commands

  These commands may affect system performance and/or force table-level locks.There is no guarantee th

  2022-06-01 05:04:48 Views: 207
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  In-depth understanding of the control files of oracle (1)

  Oracle control file here we want to experiment is that the database in the open state, break the fast control file, will the database down to check the path of controlfiles SQL > show parameter control_

  2022-06-01 05:04:48 Views: 305
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  Does the bid evaluation committee have the obligation to verify the authenticity of the bid information during the bid evaluation period?

  Does the http://www.zhaobiao.cn/ bid evaluation committee of the proposed project have the obligation to verify the authenticity of the bid information during the bid evaluation period? The bid evaluation committee has no obligation to verify the authenticity of the bid information during the bid evaluation period, but has the right to require the bidder to have a clear meaning in the bid documents.

  2022-06-01 05:04:47 Views: 258
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  PostgreSQL Source Code interpretation (46)-query statement # 31 (query_planner function # 7)

  The main implementation logic of the function query_planner subfunctions reconsider_outer_join_clauses and generate_base_implied_equalities has been introduced in the previous chapter. This section

  2022-06-01 05:04:47 Views: 222
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  Introduction to the method of modifying character set of MySQL table, field and library

  Modify the database character set: ALTER DATABASE db_name DEFAULT CHARACTER SET character_name [COLLATE...]; change the default character set and all character columns (CH)

  2022-06-01 05:04:47 Views: 276
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  Oracle 19C OGG basic operation and maintenance-08Error code

  Oracle 19C OGG basic operation and maintenance-08Error code [942] problem: source side: delete dept_bak table target side: dept_ Bak table cannot be found during data synchronization, process ABENDING, synchronization interrupted. The error log is as follows:

  2022-06-01 05:04:45 Views: 268
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  MySQL InnoDB checkpoint mechanism

  InnoDB implements the checkpoint mechanism by invoking a fuzzy checkpoint. InnoDB refreshes modified database pages from the buffer pool in small batches. This eliminates the need to refresh the entire buffer pool in a batch, as it is possible to stop the user's SQL statements from running into the

  2022-06-01 05:04:36 Views: 217
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  Open remote Desktop connection vps Group Control

  Open remote Desktop connection vps Group Control remote Desktop is a service launched by Microsoft to facilitate network administrators to manage and maintain the server. Since the introduction of the windows 2000 server version, the remote Desktop Connector has been turned on when connected to any one of the network administrators

  2022-06-01 05:04:36 Views: 298
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  PostgreSQL Source Code interpretation (199)-query # 114 (sort # 7-inittapes&dumptuples)

  This section continues to introduce the implementation of sorting, mainly the inittapes and dumptuples functions called by tuplesort_puttupleslot- > puttuple_common. Po is used when the memory cannot meet the sorting requirements

  2022-06-01 05:04:36 Views: 231
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  Oracle blocking session query

  Select INST_ID, SID, TYPE, ID1, ID2, LMODE, REQUEST, CTIME, BLOCK,DECODE (BLOCK, 0,', 'blocker') b

  2022-06-01 05:04:36 Views: 211
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  Wirecast Pro 13 for Mac (Live Video production tool) v13.1.3 Chinese version

  Wirecast Pro 13 for Mac is a live webcast tool that supports multi-machine positions. We only need a camera, an Internet connection and a Mac computer to produce professional live events. So that you can easily collect and make for webcast

  2022-06-01 05:04:32 Views: 224
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  The beginning of mysql 5.5 innodb transaction isolation level

  Summary: 1. The transaction isolation level belongs to the acid I of rdbms, that is, isolation 2. Different transaction isolation levels lead to differences in the behavior of consistent reads. 3. The default transaction isolation level of MySQL 5.5 innodb is repeatable read4.

  2022-06-01 05:04:30 Views: 299
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  Oracle ORA-00600 startup error

  Oracle is version 10.2.0.1 SQL > startup nomount;ORA-00600: internal error code, arguments: [keltnfy-ldmInit]

  2022-06-01 05:04:29 Views: 298
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  Oracle tablespace maintenance

  Tablespace maintenance (1) create tablespace CREATE TABLESPACE SUNTX DATAFILE'/app1/oracle/oradata/SUNTX/SUNTX01.dbf' SIZE 10240M AU

  2022-06-01 05:04:29 Views: 249
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  Diagnosing databases hang and Contention through the v$wait_chains view

  Before 11g, usually after our database hang resides, we will do hang analyze to analyze the database. After 11g, we can diagnose the database hang and contentio through a new view v$wait_chains.

  2022-06-01 05:04:23 Views: 298
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  DevOps growth path-Overview of Lean thinking | IDCF

  Lean thinking (Lean Thinking) originated from the lean production (Lean Production) style invented by Benfeng in the 1980s, which brought quality and cost advantages to the automobile industry, which once surpassed the American automobile industry and made the world automobile industry.

  2022-06-01 05:04:20 Views: 294
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  ORA-00600 [2702]

  Problem description: 1. Cause of abnormal node shutdown: ORA-15064: communication failure with ASM instanceORA-03113: end-of-file on commu

  2022-06-01 05:04:19 Views: 225
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  Record the database incomplete recovery caused by a power outage

  Record the incomplete recovery of the database caused by a power outage and receive a call from a friend, a windows+ora11g database failed to start due to a power outage; record the detours repaired and traveled; regret: the database is not archived and backed up, and there may be data loss when the database is opened at last.

  2022-06-01 05:04:19 Views: 241
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  Query table structure sql

  SELECT table name = Case When A.colorder=1 Then D.name Else''End, table description = Case When A.colorder=1 Then isnull (F

  2022-06-01 05:04:11 Views: 205