select to_date('2008-03-31 04:30:00','YYYY-MM-DD HH24:MI:SS') from 1. 2. 3. 4. 5. 1.2 TO_CHAR: 功能:将日期变量或数值变量转换为字符串变量 格式:TO_CHAR(value,format),其中value可以是数值,也能是日期变量。 其中数值型的格式中用9表示的整数部分则高位的0不显示,0表示则显示: select...
cause: org.postgresql.util.PSQLException: ERROR: function ifnull(numeric, numeric) does not exist 8.date_format 函数不存在 异常信息：Cause: org.postgresql.util.PSQLException: ERROR: function date_format(timestamp without time zone, unknown) does not exist PostgreSQL没有date_format函数，用to_char函...
postgres=# create database test;CREATEDATABASEpostgres=# alter database testsettablespace mytbs;ALTERDATABASEpostgres=# \c test You are now connected to database"test"asuser"postgres".test=# create tabletb_mytps(i int,namevarchar(32))tablespace mytbs;CREATETABLE 插入实验数据 代码语言:javascript...
\pset NAME [VALUE] set table output option (NAME := {format|border|expanded|fieldsep|footer|null| numericlocale|recordsep|tuples_only|title|tableattr|pager}) \t [on|off] show only rows (currently off) \T [STRING] set HTML tag attributes, or unset if none \x [on|off] toggle expan...
create foreign table emp_file_fdw (EMPNO int, ENAME varchar(10), JOB varchar(9), MGR int, HIREDATE DATE, SAL int, COMM int, DEPTNO int) server pg_file_server options(filename '/home/postgres/emp.csv',format 'csv',header 'true',delimiter ',');...
# 更新结构ALTERTABLEuser_tblALTERCOLUMNsignup_dateSETNOTNULL; # 更名栏位ALTERTABLEuser_tbl RENAMECOLUMNsignup_dateTOsignup; # 删除栏位ALTERTABLEuser_tblDROPCOLUMNemail; # 表格更名ALTERTABLEuser_tbl RENAMETObackup_tbl; # 删除表格DROPTABLEIFEXISTSbackup_tbl; ...
(StudentMapper.class); // 创建一个Student类 Student student = new Student(); // 存放数据 student.setName("赵六"); student.setAge(22); student.setHeight(1.7); student.setBirth(new Date()); student.setSex('男'); mapper.insertStudentByPOJO(student); sqlSession.commit(); sqlSession.close...
--role=ROLENAME 在恢复之前执行SET ROLE命令 恢复命令:pg_restore -U postgres --no-owner --role 还原目标的用户名 -d 还原目标的库名 -v 备份dump文件名 如:pg_restore -U postgres --no-owner --role mypg -d cosmic_fi -v /pgsql12/backup/cosmic_fi.dump ...
self.state_handler.set_role('uninitialized') self.state_handler.stop('immediate', stop_timeout=self.patroni.config['retry_timeout']) # In case datadir went away while we were master. self.watchdog.disable() # is this instance the leader? if self.has_lock(): self.release_leader_key_...
PostgreSQL: to_date(a.tag_create_date,‘yyyy-mm-dd HH:MM:SS’) 2、IFNULL()函数 MySQL: IFNULL(a.idm,‘’) PostgreSQL: COALESCE(a.id,‘’) 3、sysdate()函数 MySQL: SELECT sysdate() PostgreSQL: SELECT now() 4、find_in_set()函数(允许在逗号分隔的字符串列表中查找指定字符串的位置) ...