pd.read_sql_table('table_name', engine, columns=['No', 'name'])#读2列数据 pd.read_sql_table('table_name', engine, parse_dates=['Date']) #强制将列解析为日期 pd.read_sql_table('table_name', engine,parse_dates={'Date': {'format': '%Y-%m-%d %H:%M:%S'}})#指定日期格式字符...
package com.bjpowernode.mybatis.test; import com.bjpowernode.mybatis.mapper.StudentMapper; import com.bjpowernode.mybatis.pojo.Student; import com.bjpowernode.mybatis.utils.SqlSessionUtils; import org.apache.ibatis.session.SqlSession; import org.junit.Test; import java.text.SimpleDateFormat; impor...
5.postgresql 插入16进制数 INSERT INTO tableAAA VALUES( x'0001f' : : integer, '鉴权' , 'Authority' ) 6.使用 TG_RELNAME 报错ERROR: syntax error at or near "$1" at character [引]http://www.dbmonster.com/Uwe/Forum.aspx/postgresql/2051/TG-RELNAME-problem Perhaps you will get some idea...
SELECT to_char(DATE'tomorrow','YYYYMMDD')INTO dateStr; EXECUTE format('CREATE TABLE tab_%s (LIKE tab INCLUDING INDEXES)', dateStr); EXECUTE format('ALTER TABLE tab ATTACH PARTITION tab_%s FOR VALUES IN (%L)', dateStr, dateStr); RETURN1; END; $$; CREATE EXTENSION pg_cron; ...
) showuseage exit 1 ;; esac done BAKUP_SQL=" create table if not exists pg_log_:bak_log_span as select :today::varchar(8) as bak_date ,* from pg_log where 1 = 2 ; delete from pg_log_:bak_log_span where to_char(log_time,'yyyymmdd')::numeric = ${BAKUP_DATE} ; insert ...
# 创建新表CREATETABLEuser_tbl(nameVARCHAR(20), signup_date DATE); # 插入数据INSERTINTOuser_tbl(name, signup_date)VALUES('张三','2013-12-22'); # 选择记录SELECT*FROMuser_tbl; # 更新数据UPDATEuser_tblsetname='李四'WHEREname='张三'; ...
SELECTformat('INSERT INTO %I VALUES(%L)','Foo bar', E'O\'Reilly'); 结果:INSERT INTO"Foo bar"VALUES('O''Reilly') SELECTformat('INSERT INTO %I VALUES(%L)','locations', E'C:\\Program Files'); 结果:INSERT INTO locationsVALUES(E'C:\\Program Files') ...
(tabname) || ' WHERE inserted_by = $1 AND inserted <= $2' INTO c USING checked_user, checked_date; EXECUTE format('SELECT count(*) FROM %I ' 'WHERE inserted_by = $1 AND inserted <= $2', tabname) INTO c USING checked_user, checked_date; EXECUTE format('UPDATE tbl SET %I =...
数据库引擎内置参数的一些示例包括 autovacuum_max_workers、DateStyle、client_min_messages、password_encryption、max_connections、geqo、from_collapse_limit、cpu_tuple_cost、cpu_tuple_cost、max_standby_streaming_delay、log_connections、log_min_duration_statement、max_parallel_workers、bgwriter_delay 和shared_...
postgres=# insert into t_native_range values(1,'2016-09-01',1); INSERT01 list 分区表 表格通过明确的键值进行分区。 创建主分区 postgres=# create table t_native_list(f1 bigserial not null,f2 text, f3 integer,f4 date) partition by list( f2 ) distribute by shard(f1); ...