一、查看pg 表字段‘名称’、‘类型’、‘非空’、‘注释’ SELECTa.attnameas字段名, format_type(a.atttypid,a.atttypmod)as类型, a.attnotnullas非空, col_description(a.attrelid,a.attnum)as注释FROMpg_classasc,pg_attributeasawherea.attrelid = c.oidanda.attnum>0andc.relname ='你的表名'...
PostgreSql 查询表结构和说明 select(selectrelnamefrompg_classwhereoid=a.attrelid) relname , (selectrelname||'--'||(selectdescriptionfrompg_descriptionwhereobjoid=oidandobjsubid=0)ascommentfrompg_classwhereoid=a.attrelid)astable_name, a.attnameascolumn_name, format_type(a.atttypid,a.atttypmod)...
1. 2. 3. 查看特定表名备注 select relname as tabname, cast(obj_description(relfilenode,'pg_class') as varchar) as comment from pg_class c where relname ='表名'; 1. 2. 3. 查看特定表名字段 select a.attnum,a.attname,concat_ws('',t.typname,SUBSTRING(format_type(a.atttypid,a.att...
在我们创建一个表的同时,实际上会自动创建一个以这个表名为命名的type, 所以昨天根本不是什么问题,是我的失误。 通过下面的语句可以看到你的数据库中到底有没有composite 的类型以及他的名字 代码语言:javascript 代码运行次数:0 运行 AI代码解释 SELECTn.nspnameASschema,pg_catalog.format_type(t.oid,NULL)ASna...
{ "name": "AzurePostgreSqlLinkedService", "properties": { "type": "AzurePostgreSql", "typeProperties": { "connectionString": "Server=<server>.postgres.database.azure.com;Database=<database>;Port=<port>;UID=<username>;Password=<Password>" } } } 示例: 在Azure 密钥保管库中存储密码 JSON...
pg_catalog.format_type(a.atttypid, a.atttypmod) as column_type, CASE WHEN (SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid) for 128) FROM pg_catalog.pg_attrdef d WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef) IS NOT NULL THEN ...
PLPGSQL_TTYPE_PSEUDO: ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), errmsg("variable \"%s\" has pseudo-type %s", refname, format_type_be(dtype->typoid))); result = NULL; /* keep compiler quiet */ break; default: elog(ERROR, "unrecognized ttype: %d", dtype->ttype); resu...
to_char 函数 to_char(expre, format)函数用于将 timestamp、interval、integer、double precision 或者 numeric 类型的值转换为指定格式的字符串。 SELECTto_char(current_timestamp,'HH24:MI:SS'),to_char(interval'5h 12m 30s','HH12:MI:SS'),to_char(-125.8,'999D99');to_char|to_char|to_char|--...
col_description(a.attrelid,a.attnum) as "注释", concat_ws('',t.typname,SUBSTRING(format_type(a.atttypid,a.atttypmod) from '(.*)')) as "字段类型" FROM pg_class as c, pg_attribute as a, pg_type as t WHERE c.relname = 't_batch_task' and a.atttypid = t.oid and a.attr...
PostgreSQL没有date_format函数，用to_char函数替换。替换例子：// %Y => YYYY // %m => MM // %d => DD // %H => HH24 // %i => MI // %s => SS to_char(time,'YYYY-MM-DD') => DATE_FORMAT(time,'%Y-%m-%d')to_char(time,'YYYY-MM') => DATE_FORMAT(time,'%Y-%m')to_char...