备份表/数据,无索引与约束 (CREATE TABLE AS) CREATETABLE[ifnotexists] 新表名AStable旧表 [with[no] data] if not exists:判断表是否存在,如果不存在进行创建,存在则不进行创建 with data:复制数据 with no data:不复制数据 仅复制表结构,不会复制数据、索引、字段约束(非
create table if not exists 新表 (like 旧表 including indexes including comments including defaults); 删除表 drop table if exists "t_template" cascade; 查询注释 SELECT a.attname as "字段名", col_description(a.attrelid,a.attnum) as "注释", concat_ws('',t.typname,SUBSTRING(format_type(a...
postgres=# CREATE TABLE t_native_range_default PARTITION OF t_native_range DEFAULT; CREATE TABLE 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 t...
SQL Server CREATE TABLE IF NOT EXISTS Equivalent To check if a table exists before creating it, you can enclose the CREATE TABLE statement inside an IF statement. IFNOTEXISTS(SELECT*FROMsys.tablestINNERJOINsys.schemas sONt.schema_id=s.schema_idWHEREs.name='my_schema_name'ANDt.name='table_n...
mysql-to-postgres:https:///maxlapshin/mysql2postgres mysql-postgresql-converter:https:///lanyrd/mysql-postgresql-converter 多款工具配合使用:https://yq.aliyun.com/articles/241 (不得不佩服这兄弟真有耐心啊!) 然而试用后,内心是崩溃的……生成出来的DDL要么有误,要么没有注释。
cd /home/postgres/pg/share/extension 1. 2. 此时可以看见plpython3u.control文件已经存在 编辑环境变量 cd vim .bash_profile 1. 2. 加入以下变量 export PATH=/home/postgres/pg/bin:$PATH export PGDATA=/home/postgres/pg/data 1. 2. 加载 ...
SELECT create_constraint_if_not_exists( 'foo', 'bar', 'ALTER TABLE foo ADD CONSTRAINT bar CHECK (foobies < 100);') 更新: 根据下面 Webmut的回答 建议: ALTER TABLE foo DROP CONSTRAINT IF EXISTS bar; ALTER TABLE foo ADD CONSTRAINT bar ...; 这在您的开发数据库中可能没问题,或者您知道...
CREATESEQUENCE IFNOTEXISTSpublic.ev_id_seq INCREMENT1START1MINVALUE1MAXVALUE2147483647CACHE1; 3.xorm的pg脚本报错pq: syntax error at or near “Type” --- Data for Name: enum_ev; Type: TABLE DATA; Schema: public; Owner: postgres--INSERTINTOpublic.enum_evVALUES(2,'converse','逆行',1); ...
drop table if exists bills ; create table bills ( id serial not null, goodsdesc text not null, beginunit text not null, begincity text not null, pubtime timestamp not null, amount float8 not null default 0, primary key (id) ); COMMENT ON TABLE bills is '运单记录'; COMMENT ...
CREATE TABLE IF NOT EXISTS football_players( id SERIAL PRIMARY KEY, /* Unique identifier for each player (it's possible multiple players have the same name/similiar information) */ name VARCHAR(50) NOT NULL, /* The player's first & last na...