Copying a PostgreSQL database to another server is a common task, especially when setting up backups, testing environments, or migrating data. PostgreSQL offers several tools to make this process efficient, primarily using pg_dump and pg_restore or by directly piping data over a network. Method ...
copy命令可以类似地完成一些stream完成的功能,尽管copy命令与stream方式不是一个重量级。下面描述copy命令的主要用法。 1、copy命令的帮助信息 scott@SYBO2SZ> help copy COPY --- Copies data from a query to a table in the same or another database. COPY supports CHAR, DATE, LONG, NUMBER and VARCHAR2...
[postgres@db2 ttdata]$ psql psql Type 'help' for help.testdb=# create table test_copy(id int4,name varchar(32));testdb=# \copy test_copy from /home/postgres/test_copy.txt ; #把文本数据导入到表中testdb=#\copy test_copy to /home/postgres/test_copy1.txt ; #以tab制表符隔离testdb...
因为业务需求,需要将服务器上的postgre多个数据库的数据整个库得迁移到另一个postgre数据库上。 一般表较少时,会使用postgre 的copy to 和 copy from 命令就能完成表的迁移,但这种方式需要target_database 上提前先创建好对应的表,并且每一个表都需要一次copy to 和copy from操作,当表比较多的时候,非常繁琐。 因此...
[postgres@db2ttdata]$ psql psql Type 'help' for help. testdb=# create table test_copy(id int4,name varchar(32)); testdb=# \copy test_copy from /home/postgres/test_copy.txt ; #把文本数据导入到表中testdb=#\copy test_copy to /home/postgres/test_copy1.txt ; #以tab制表符隔离 ...
[postgres@db2 ttdata]$ psql psql Type 'help' for help. testdb=# create table test_copy(id int4,name varchar(32)); testdb=# \copy test_copy from /home/postgres/test_copy.txt ; #把文本数据导入到表中testdb=#\copy test_copy to /home/postgres/test_copy1.txt ; #以tab制表符隔离 ...
3 Copy Table from One Database to another database in the same cluster? 0 How to copy table data from one db to another? 0 Copy Table from one MySQL server to another 2 Check the time that PostgreSQL is taking to automatically create existing indexes when you do bulk insert using ...
[postgres@db2 ttdata]$ psql psql Type "help" for help. testdb=# create table test_copy(id int4,name varchar(32)); testdb=# \copy test_copy from /home/postgres/test_copy.txt ; #把文本数据导入到表中testdb=#\copy test_copy to /home/postgres/test_copy1.txt ; #以 tab 制表符隔离...
Now, pin the buffer so no one can steal it from the * buffer pool, and check to see if the correct data has been loaded * into the buffer. */ 【找到了!直接pinbuffer】 buf = GetBufferDescriptor(buf_id); 【下面有这个函数的展开分析,共享内存中desc和本地缓存ref_count都做++】 valid =...
PostgreSQL Replication is when data is copied from one database server to another. The source database server is usually called the Master server, whereas the database server receiving the copied data is called the Replica server.