使用schema:在SQL语句中可以通过在表名前加上schema名称来引用该schema下的表,例如: SELECT * FROM schema_name.table_name; 复制代码 设置默认schema:在某些数据库管理系统中,可以设置默认schema,这样在查询时不需要每次指定schema名称,例如在PostgreSQL中可以使用以下语句设置默认schema: SET search_path TO schema_na...
例如,要允许oa_user在其oaschema 中创建表: GRANT CREATE ON SCHEMA oa TO oa_user; 1. 授予其他权限,如USAGE(允许用户使用 schema 中的对象)或ALTER(允许用户修改 schema 中的对象),可根据业务需求规划。 授权示例: 配置dbadmin可以访问新建的schema mydatabase=# GRANT USAGE ON SCHEMA mydb_thb01 TO use...
create unique index MYDB.UNIQUE_NAME on MYDB.T_GOODS (CASE WHEN ("STATUS"='A' AND "END_TS"=TO_DATE(' 9999-01-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) THEN UPPER("NAME")||'_'||TO_CHAR(NVL("PARENT_ID",0)) ELSE NULL END) 1. 2. 3. 注意:USING 后面的表或者子查询...
USEAdventureWorks2022; GOCREATESCHEMASprockets AUTHORIZATION AnnikCREATETABLENineProngs (sourceint,costint, partnumberint)GRANTSELECTONSCHEMA::SprocketsTOMandar DENYSELECTONSCHEMA::SprocketsTOPrasanna; GO 示例:Azure Synapse Analytics 和 Analytics Platform System (PDW) ...
postgressql create schema 语法 在PostgreSQL中，CREATE SCHEMA语句用于创建一个新的模式（Schema）。模式是数据库对象的命名空间，它允许在同一数据库中创建具有相同名称但属于不同模式的表、视图、函数等对象。以下是CREATE SCHEMA语句的基本语法：CREATE SCHEMA schema_name [AUTHORIZATION role_name][schema_element [,...
Schema_Name := Quoted_or_Unquoted_Identifier. Remarks Schema_Name Specifies the name of the schema in form of a quoted or unquoted U-SQL identifier. If a schema of the given name already exists inside the current database context or the user has no permissions to create a schema, an er...
CREATE {DATABASE | SCHEMA} [IF NOT EXISTS] db_name [create_specification] ... create_specification: [DEFAULT] CHARACTER SET [=] charset_name | [DEFAULT] COLLATE [=] collation_name Explanation: This SQL syntax is used to create a new database or schema in a database management system. ...
2 创建数据库 schema DROP SCHEMA IF EXISTS sakila; /*如果存在 sakila数据库,则删除*/ CREATE SCHEMA sakila; /*创建数据库*/ USE sakila; 3 创建表 table 创建表格和创建数据库都相对简单,语句的语法也不难记。 -- 创建表 actor CREATE TABLE actor ( actor_id SMALLINT UNSIGNED NOT NULL AUTO_INCREMEN...
Requires CREATE SCHEMA permission on the database. To create an object specified within the CREATE SCHEMA statement, the user must have the corresponding CREATE permission. To specify another user as the owner of the schema being created, the caller must have IMPERSONATE permission on that user. ...
CREATETABLE"myschema"."o_ls_test" ( "rid" int4, "name"varchar(200) COLLATE "pg_catalog"."default", "timeflag"timestampwithout time zonedefaultclock_timestamp() ) ;ALTERTABLE"myschema"."o_ls_test" OWNERTO"pguser"; COMMENTONCOLUMN"myschema"."o_ls_test"."rid"IS'rid'; ...