test=# create user test with password '123456';CREATE ROLEtest=# \cYou are now connected to database "test" as user "postgres".test=# grant SELECT on ALL tables in schema mytest to test;GRANTtest=# set search_path to mytest ;SETtest=# alter schema mytest owner to test;ALTER SCHEMA...
GRANT SELECT ON ALL TABLES IN SCHEMA public TO myuser; 说明执行GRANT SELECT语句后如何验证权限是否已成功授予: 可以通过让用户尝试执行SELECT查询来验证权限是否授予成功。如果用户能够成功查询数据,则说明权限已授予。 也可以使用PostgreSQL的系统视图和函数来检查权限。例如,查询information_schema.table_privileges视...
grant all privileges on table product to username; 4、授予指定用户所有表的所有权限 GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO username; 三、数据库表或者索引 1、获取数据库表中的索引 select * from pg_indexes where tablename = 'product'; 2、获取当前db中所有表信息 select * from p...
The output table would return all the data or students having studentsId >2, copied for the Students_info table. The output will look like this: Example 3: Incompatible Column Type Error One thing is to take notice that the datatypes of columns of both tables must be the same. Let’s s...
为select添加的子查询返回多列,可以使用以下方法: 1. 使用多个子查询:可以在select语句中使用多个子查询,每个子查询返回一个列。例如: ``` SELECT (SELECT ...
至于属于我自己的对象、表、视图等都还没有: SQL> select count(*) from user_tables; COUNT(*) --- 0 SQL> select...Oracle的权限可以分为两类: 系统权限,每个系统权限允许用户对Schema对象执行一种或一类特定的数据库操作,例如CREATE SESSION、CREATE TABLESPACE、CREATE TABLE...常见的各类对象权限可以通过...
All View PDF SELECTDescription SELECT retrieves data from a table or view. Serving as an overlaid filter on database tables, the SELECT statement uses SQL keywords to filter data tables and extract the required data.Precautions The owner of the table, users granted with the SELECT permission...
Allow parallel CREATE INDEX for GIN indexes Allow using parallel workers to build a GIN index, similarly to BTREE and BRIN. For large tables this may result in significant speedup when the build is CPU-bound. The work is divided so that each worker builds index entries on a subset of the...
jar \ <mysql-sync-database|oracle-sync-database|postgres-sync-database|sqlserver-sync-database> \ --database <selectdb-database-name> \ [--job-name <flink-job-name>] \ [--table-prefix <selectdb-table-prefix>] \ [--table-suffix <selectdb-table-suffix>] \ [--including-tables <...
postgres@[local:/tmp]:2004=#40524 create table tab_log_hint_off(id int, name varchar(200));CREATETABLE postgres@[local:/tmp]:2004=#40524 insert into tab_log_hint_off select generate_series(1,50000000),'jason';INSERT050000000 我们记录一下当前的WAL LOG的日志量列表: 当前的日志是 0000000500...