CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXISTS ] table_name ( [ { column_name data_type [ COLLATE collation ] [ column_constraint [ ... ] ] | table_constraint | LIKE source_table [ like_option ... ] } [, ... ] ] ) [ INHERITS ( ...
CREATE [ TEMPORARY | TEMP ] SEQUENCE [ IF NOT EXISTS ] name [ AS data_type ] [ INCREMENT [ BY ] increment ] [ MINVALUE minvalue | NO MINVALUE ] [ MAXVALUE maxvalue | NO MAXVALUE ] [ START [ WITH ] start ] [ CACHE cache ] [ [ NO ] CYCLE ] [ OWNED BY { table_name.col...
err := db.Model(model).CreateTable(&orm.CreateTableOptions{ //Temp: true,//建表是临时的 IfNotExists: true, }) if err != nil { return err } } return nil } 3.3 删除表 创建数据库表的函数为DropTable,函数参数为DropTableOptions类型的指针,下面一起来看下DropTableOptions结构体。 type DropT...
testdb=>CREATETABLEt(idint)tablespaceapp_tbs;CREATETABLEtestdb=>SELECT*FROMpg_tablesWHEREtablename='t';schemaname|tablename|tableowner|tablespace|hasindexes|hasrules|hastriggers|rowsecurity---+---+---+---+---+---+---+---public|t|tony|app_tbs|f|f|f|f(1row) PostgreSQL 支持在CREATE...
CREATE TABLE定义一个新表。CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name ( { column_name data_type [ DEFAULT default_expr ] [ column_constraint [ ... ] ] | table_constraint | LIKE parent_table [ { INCLUDING | EXCLUDING } DEFAULTS ] } [, ... ] ) [ ...
createsequence fl_user_seq incrementby1minvalue1no maxvalue startwith1; 2、更改序列值(方法中两个参数分别是1.序列名字,2.序列修改后值): selectsetval('fl_user_seq',88); 3、创建序列 CREATESEQUENCEifnotexiststest_mergetable_id_seq INCREMENT1MINVALUE1MAXVALUE999999999START1CACHE1;--或者:createseq...
postgres=# \helpSELECTCommand:SELECTDescription:retrieve rows from a table or viewSyntax:[WITH[RECURSIVE]with_query[,...]]SELECT[ALL|DISTINCT[ON(expression[,...])]][*|expression[[AS]output_name][,...]][FROMfrom_item[,...]][WHEREcondition][GROUPBYgrouping_element[,...]][HAVINGcondition...
CREATE EXTENSION IF NOT EXISTS timescaledb CASCADE; 创建时序表 创建标准表conditions,示例如下: CREATE TABLE conditions ( time TIMESTAMPTZ NOT NULL, location TEXT NOT NULL, temperature DOUBLE PRECISION NULL, humidity DOUBLE PRECISION NULL ); 创建时序表,示例如下: SELECT create_hypertable('conditions...
CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXISTS ] table_name ( [ { column_name data_type [ COLLATE collation ] [ column_constraint [ ... ] ] | table_constraint | LIKE source_table [ like_option ... ] } ...
Note that PostgreSQL creates temporary tables in a special schema, therefore, you cannot specify the schema in the CREATE TEMP TABLE statement. If you list the tables in psql, you will see the temporary table customers only, not the permanent one: \dt+ Output: Schema | Name | Type | Owne...