COALESCE("parameters".parameter_name, '') || ' ' || COALESCE("parameters".udt_name, '') AS params, "parameters".ordinal_position FROM "information_schema"."routines" LEFT JOIN "information_schema"."parameters" ON "routines".specific_name="parameters".specific_name WHERE "routines".specific_...
COALESCE("parameters".parameter_name, '') || ' ' || COALESCE("parameters".udt_name, '') AS params, "parameters".ordinal_position FROM "information_schema"."routines" LEFT JOIN "information_schema"."parameters" ON "routines".specific_name="parameters".specific_name WHERE "routines".specific_...
使用\d元命令查看表字段信息和索引信息 在cmd界面使用psql连接db后,输入\d加上表名即可: \d t_student 1. 通过系统数据字典查询表结构 select col.table_schema, col.table_name, col.ordinal_position, col.column_name, col.data_type, col.character_maximum_length, col.numeric_precision, col.numeric_sc...
col.column_name, col.data_type, col.character_maximum_length, col.numeric_precision, col.numeric_scale, col.is_nullable, col.column_default, des.description from information_schema.columns col left join pg_description des on col.table_name::regclass = des.objoid and col.ordinal_position = de...
ORDER BY col.table_name, col.ordinal_position; -- 查询所有没注释的表 SELECT tb.table_name, d.description FROM information_schema.tables tb JOIN pg_class c ON c.relname = tb.table_name LEFT JOIN pg_description d ON d.objoid = c.oid AND d.objsubid = '0' ...
ORDER BY ordinal_position; 其中,your_table_name是要查询的表格名称。该语句将返回表格中所有列的名称、数据类型、最大字符长度和默认值。 接下来,使用以下SQL语句来显示表格的内容: 代码语言:txt 复制 SELECT * FROM your_table_name; 其中,your_table_name是要查询的表格名称。该语句将返回表格中所有行的数据...
, col.is_nullable, col.column_default, des.description from information_schema.columns col left join pg_description des on col.table_name::regclass = des.objoid and col.ordinal_position = des.objsubid where table_schema = 'public' and table_name = 't_student' order by ordinal_position;...
"parameters".ordinal_positionFROM"information_schema"."routines"LEFTJOIN"information_schema"."parameters"ON"routines".specific_name="parameters".specific_nameWHERE"routines".specific_schema='abc'ORDERBY1,2,6; AI代码助手复制代码 这里我们再使用聚合函数: string_agg 把字段 params所有行连接成字符串,并用...
But we treat it as one anyway, since in * very many places it's convenient to process a whole query targetlist as a * single expression tree. * * In a SELECT's targetlist, resno should always be equal to the item's * ordinal position (counting from 1). However, in an INSERT ...
pg_type t WHERE c.relname ='dm_fact_debit'and a.attnum >0 and a.attrelid = c.oid and a.atttypid = t.oid ORDER BY a.attnum;3、既能查看表结构，也能查看多个主键 SELECT A.ordinal_position,A.column_name,CASE A.is_nullable WHEN'NO'THEN0ELSE1END AS is_nullable,A.data_type,coale...