The TO_CHAR() function fetches the month name from the given date. Example 3: Getting Month Name From Current Date To get the month name from the current date, the CURRENT_DATE function and “Month” are passed as arguments to the TO_CHAR() function: SELECTTO_CHAR(CURRENT_DATE,'Month'...
select * from pg_tables where schemaname='qdxn'; --查询表的结构信息 select * from information_schema.columns where table_name = 'dm_xnjk_xndf_m'; --添加字段 ALTER TABLE x_report_info ADD COLUMN in_param text; --获取32位UUID(前提是支持uuid_generate_v4()函数) --若不支持,执行create...
convert(string using conversion_name) text 使用指定的转换名字改变编码。 convert('PostgreSQL' using iso_8859_1_to_utf8) 'PostgreSQL' lower(string) text 把字串转化为小写 lower('TOM') tom octet_length(string) int 字串中的字节数 octet_length('jose') 4 overlay(string placing string from int ...
v_partition_name=to_char(to_date(v_date_start,'yyyy-mm-dd')+i,'yyyymmdd');SELECTcount(1)intov_cntfrompg_tableswhereschemaname=v_schema_nameandtablename=v_table_name||'_'||v_partition_name;ifv_cnt=0thenv_exec_sql=v_exec_sql||'create table'||v_schema_name||'.'||v_table_name...
Hi , i have configured for Data replication but i dont see the process from select * from pg_stat_replication; , below is the output of the command, na=# select * from pg_stat_replication; pid | usesysid | usename | application_name | client_addr | client_hostname | c lient_port...
CREATE TABLE as <SELECT 语句>; --(主要的是复制表不能复制表的约束) 1. 2. 示例: AI检测代码解析 CREATE TABLE test as SELECT * FROM emp; --如果只复制表的结构不复制表的数据则: SELECT TABLE test as SELECT * FROM emp WHERE 1 = 2; 1. 2. 3. ...
问在单个查询中显示不同时间段的PostgreSQLEN我有一个查询，它将返回来自(来自特定时间段/总发行量的...
app.get('/backup',async(req, res)=>{ // Create a name for the backup file constfileName ="database-backup-"+newDate().valueOf()+".tar"; // Execute the pg_dump command to generate the backup file execute("PGPASSWORD="+ process.env.PGPASS+" pg_dump -U "+ process.env.DB_USER...
PostgreSQL 是一个功能强大的开源关系型数据库管理系统,广泛用于各种应用场景。在 PostgreSQL 中,日期和时间数据类型(如 date 和timestamp)提供了丰富的函数和操作符,用于处理日期和时间的计算和比较。 查找两个日期之间的差异大于1天/月的记录 1. 查找两个日期之间的差异大于1天的记录 假设我们有...
end_date = get_next_month_first_day(d2) # get sub table name getmonth = datetime.datetime.strftime(d2, '%Y_%m') sub_table = table + '_' + getmonth create_table(db, table, sub_table, start_date, end_date) if __name__ == '__main__': create_sub_table('test', 'tbl_game...