systemctl start postgresql-13 ★第2章、设置数据存储路径 PostgreSQL 初始化数据库之后， 10版本的默认的数据目录是/var/lib/pgsql/ 13版本的默认的数据目录是/var/lib/pgsql/13/ 现在想修改为/data_pg/ 目录 ★PG-13版本 # systemctl stop postgresql-13 chown postgres:postgres /data_pg # vi /var/lib/pgsql/13/data/postgresql.conf #pg-13版本，添加或修改以下配 置 data_directory = '/data_pg/data/' # mv /var/lib/pgsql/13/* /data_pg/ /usr/lib/systemd/system/postgresql-13.service #pg-13版本，修改systemd服 务文件，指定数据目录 #修改这行：Environment=PGDATA=/var/lib/pgsql/13/data/ 改为新的路径，如 下： Environment=PGDATA=/data_pg/data/ # systemctl daemon-reload # systemctl

..............................................................................................805 VAR................................................................................................... numeric double precision for floating-point arguments, otherwise numeric historical alias for var_samp var_pop(expression) smallint, int, bigint, real, double precision, or numeric double precision for otherwise numeric population variance of the input values (square of the population standard deviation) var_samp(expression) smallint, int, bigint, real, double precision, or numeric double precision for floating-point

..............................................................................................852 VAR................................................................................................... numeric double precision for floating-point arguments, otherwise numeric historical alias for var_samp var_pop(expression) smallint, int, bigint, real, double precision, or numeric double precision for otherwise numeric population variance of the input values (square of the population standard deviation) var_samp(expression) smallint, int, bigint, real, double precision, or numeric double precision for floating-point

..............................................................................................862 VAR................................................................................................... numeric double precision for floating-point arguments, otherwise numeric historical alias for var_samp var_pop(expression) smallint, int, bigint, real, double precision, or numeric double precision for otherwise numeric population variance of the input values (square of the population standard deviation) var_samp(expression) smallint, int, bigint, real, double precision, or numeric double precision for floating-point

..............................................................................................754 VAR................................................................................................... numeric double precision for floating-point arguments, otherwise numeric historical alias for var_samp var_pop(expression) smallint, int, bigint, real, double precision, or numeric double precision for otherwise numeric population variance of the input values (square of the population standard deviation) var_samp(expression) smallint, int, bigint, real, double precision, or numeric double precision for floating-point

..............................................................................................798 VAR................................................................................................... numeric double precision for floating-point arguments, otherwise numeric historical alias for var_samp var_pop(expression) smallint, int, bigint, real, double precision, or numeric double precision for otherwise numeric population variance of the input values (square of the population standard deviation) var_samp(expression) smallint, int, bigint, real, double precision, or numeric double precision for floating-point

..............................................................................................835 VAR................................................................................................... numeric double precision for floating-point arguments, otherwise numeric historical alias for var_samp var_pop(expression) smallint, int, bigint, real, double precision, or numeric double precision for otherwise numeric population variance of the input values (square of the population standard deviation) var_samp(expression) smallint, int, bigint, real, double precision, or numeric double precision for floating-point

..............................................................................................912 VAR................................................................................................... numeric double precision for floating-point arguments, otherwise numeric historical alias for var_samp var_pop(expression) smallint, int, bigint, real, double precision, or numeric double precision for deviation) 308 Chapter 9. Functions and Operators Function Argument Type Return Type Description var_samp(expression) smallint, int, bigint, real, double precision, or numeric double precision for floating-point

..............................................................................................882 VAR................................................................................................... numeric double precision for floating-point arguments, otherwise numeric historical alias for var_samp var_pop(expression) smallint, int, bigint, real, double precision, or numeric double precision for otherwise numeric population variance of the input values (square of the population standard deviation) var_samp(expression) smallint, int, bigint, real, double precision, or numeric double precision for floating-point

..............................................................................................781 VAR................................................................................................... numeric double precision for floating-point arguments, otherwise numeric historical alias for var_samp var_pop(expression) smallint, int, bigint, real, double precision, or numeric double precision for otherwise numeric population variance of the input values (square of the population standard deviation) var_samp(expression) smallint, int, bigint, real, double precision, or numeric double precision for floating-point