pgsql查询表信息
在PostgreSQL中,您可以使用pg_catalog.pg_tables
视图来查询数据库中的表信息。以下是一个查询示例,它返回所有用户定义表的名称、所有者和schema:
SELECT
tablename as "Table",
tableowner as "Owner",
schemaname as "Schema"
FROM
pg_catalog.pg_tables
WHERE
schemaname NOT IN ('pg_catalog', 'information_schema');
如果您想要获取更详细的表信息,比如表的列、数据类型、约束等,可以使用information_schema.columns
视图。以下是一个查询示例,它返回特定表的列信息:
SELECT
column_name as "Column",
data_type as "Data Type",
is_nullable as "Is Nullable",
column_default as "Default"
FROM
information_schema.columns
WHERE
table_schema = 'your_schema'
AND table_name = 'your_table';
请将your_schema
和your_table
替换为您想要查询的实际schema和表名。
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