sql SELECT column_name FROM information_schema.columns WHERE table_name = 'my_table' ORDER BY ordinal_position; 此时,你应该能看到字段顺序已经调整为(id, age, name, address)。 通过上述步骤,我们可以在PostgreSQL中间接地调整字段顺序。虽然这种方法相对复杂,但它是目前PostgreSQL官方支持的一种可行方案。
position(substring in string) int 指定的子字串的位置 position('om' in 'Thomas') 3 substring(string [from int] [for int]) text 抽取子字串 substring('Thomas' from 2 for 3) hom substring(string from pattern) text 抽取匹配 POSIX 正则表达式的子字串 substring('Thomas' from '…$') mas su...
ORDER BY column_position) AS seq, COUNT (1) OVER (PARTITION BY table_owner, table_name, column_name, column_position) AS dup FROM sys.dba_ind_columns WHERE index_owner = 'SCOTT') WHERE dup != 1 START WITH seq = 1 CONNECT BY PRIOR seq + 1 = seq AND PRIOR index_owner = index_...
SELECT `DictTypeId`,`Value`,`Code`,`OrderNo`,`Remark`,`Status`,`CreateTime`,`UpdateTime`,`CreateUserId`,`UpdateUserId`,`IsDelete`,`Id` FROM `SysDictData` WHERE ( `DictTypeId` = 14544926246725 ) AND ( `IsDelete` = 0 )ORDER BY `OrderNo` ASC【MySQL数据库---异常 2023/10/11 星期...
order by cc.position; 8、存储函数和过程 查看函数和过程的状态 SQL>select object_name,status from user_objects where object_type='FUNCTION'; SQL>select object_name,status from user_objects where object_type='PROCEDURE'; 查看函数和过程的源代码 ...
GROUP BY ltrim(rtrim(name)) --10、时间格式化 to_char(列名,‘yyyy-mm-dd hh24:mi:ss’) --11、left、right字符串截取 SELECT "left"('Y043340123', 6),"right"('Y043340123', 6) --12、position获取指定字符占位 SELECT "position"('Y043_340123', '_')...
获取一个表的所有字段名 CREATEORREPLACEFUNCTIONgetColumn(schemanametext,tablenametext)RETURNSTEXT[]AS$$DECLARERETTEXT[]:=ARRAY[]::TEXT[];ELERECORD;-- 定义记录类型变量BEGINFORELEIN(SELECTcolumn_namefrominformation_schema.columnswheretable_schema=$1andtable_name=$2orderbyordinal_position)LOOPRET=(SELECT...
SELECTcol_description(table_oid, col_position); AI代码助手复制代码 补充:查询PostgreSQL库中所有表的表结构信息SQL 我就废话不多说了,大家还是直接看代码吧~ select(selectrelnameascommentfrompg_classwhereoid=a.attrelid)astable_name,row_number()over(partitionby(selectrelnameascommentfrompg_classwhereoid=a...
order by table_catalog, table_schema, ordinal_position 热忱回答(5) fate staVIP0 2024/11/1 不要创建SysConfig 这个名字表。和系统表可能冲突 0回复 lonely boyVIP0 2024/11/1 @fate sta:这个名字没有问题,系统表都是pg打头,这个原因SqlSugar代码里面 ...
order by table_name, ordinal_position; --查询表有什么索引 SELECT * FROM pg_indexes WHERE schemaname = 'my_schema' AND tablename = 'my_table'; --查看表有什么索引(contype索引类型:c = 检查约束;f = 外键约束;p = 主键约束;u = 约束;t = 触发器约束) ...