COPY 命令是SQL命令,\copy 命令是元命令. COPY 命令必须具有SUPERUSER超级权限(将数据通过stdin/stdout方式导入导出情况除外),而 \copy 元命令不需要SUPERUSER权限。 COPY 命令读取或写入数据库服务端主机上的文件,而 \copy 元命令是从psql客户端主机读取或写入文件。 从性能方面看, 大数据量导出文件或大文件数据导...
接下来 ,执行如下命令,期间需要分多次输入密码,执行成功后如下: PSC:\Users\admin> psql-hxxx.xxx.xxx.xxx.xxx-p5432-Upguser-ddb0-X-q-c"copy (select column1, column2, column3, column4 from table1 offset 20 limit 10) to STDOUT (FORMAT csv ,HEADER false ,FORCE_QUOTE *, encoding 'UTF8'...
3.8 FORCE_QUOTE 参数 •column_name [, ...]:指定需要强制引用的列。 3.9 HEADER 参数 •true:指定CSV文件中包含表头。 •false:指定CSV文件中不包含表头。 4. copy命令的使用示例 4.1 从文件中导入数据到表中 COPYemployeesFROM'/path/to/employees.csv'DELIMITER','CSVHEADER; 上述示例将从名为employee...
COPY 表名 [ ( 字段 [, ...] ) ] TO { '文件名' | STDOUT } [ [ WITH ] [ BINARY ] [ OIDS ] [ DELIMITER [ AS ] 'delimiter' ] [ NULL [ AS ] 'null string' ] [ CSV [ QUOTE [ AS ] 'quote' ] [ ESCAPE [ AS ] 'escape' ] [ FORCE QUOTE column [, ...] ] 命令: C...
92. [ CSV [ QUOTE[ AS ] 'quote' ] 93. [ ESCAPE[ AS ] 'escape' ] 94. [ FORCE NOT NULL column[, ...]] 95. 96. COPY 表名 [ ( 字段[, ...]) ] 97. TO { '文件名' | STDOUT } 98. [ [ WITH] 99. [ BINARY ] ...
\copy table [ ( column_list ) ] { from | to } { filename | stdin | stdout | pstdin | pstdout } [ with ] [ oids ] [ delimiter [ as ] 'character' ] [ null [ as ] 'string' ] [ csv [ quote [ as ] 'character' ] [ escape [ as ] 'character' ] [ force quote column...
COPY表名[ (字段[, ...] ) ] TO { '文件名' | STDOUT } [ [ WITH ] [ BINARY ] [ OIDS ] [ DELIMITER [ AS ] 'delimiter' ] [ NULL [ AS ] 'null string' ] [ CSV [ QUOTE [ AS ] 'quote' ] [ ESCAPE [ AS ] 'escape' ] [ FORCE QUOTE column [, ...] ] 命令: CREATE ...
\copy table [ ( column_list ) ] { from | to } { filename | stdin | stdout | pstdin | pstdout } [ with ] [ oids ] [ delimiter [ as ] ‘character’ ] [ null [ as ] ‘string’ ] [ csv [ quote [ as ] ‘character’ ] [ escape [ as ] ‘character’ ] [ force quote...
as ] 'character' ] [ null [ as ] 'string' ] [ csv [ header ] [ quote [ as ] 'character' ] [ escape [ as ] 'character' ] [ force quote column_list ] [ force not null column_list ] ] 执行前端(客户端)拷贝。这是一个运行 SQL COPY 命令的操作, 不同的是服务器在读写指明的文...
就是可以减转义字符的使用，使程序看起来更加简洁，更清晰。所以这里简单给大家分享一下，并举例说明。