CREATE TABLE AUDIT( EMP_ID INT NOT NULL, ENTRY_DATE TEXT NOT NULL ); 1. 2. 3. 4. 在COMPANY表上创建触发器之前,首先创建一个名为auditlogfunc()的函数/过程。 执行以下查询语句来创建函数/过程: CREATE OR REPLACE FUNCTION auditlogfunc() RET
LANGUAGE sqlVOLATILESECURITY DEFINER;CREATE OR REPLACE VIEW postgres_exporter.pg_stat_activityASSELECT * from get_pg_stat_activity();GRANT SELECT ON postgres_exporter.pg_stat_activity TO postgres_exporter;CREATE OR REPLACE FUNCTION get_pg_stat_replication() RETURNS SETOF pg_stat_replication AS$$ S...
Create a fork:创建一个Fork仓库 Merge changes:将当前Fork仓库的修改合并至主仓库 Add Reauest:添加一个请求 Add Folder:添加一个文件夹 Duplicate:复制当前集合 Export:导出当前集合 Remove form workspace:从工作空间删除 Postman中对请求、文件夹和集合添加描述时,可以使用Markdown语言来编写,支持插入图片等内容,在...
给sl_view.orders.age 字段上面加btree索引: t = SlTable.last c = t.sl_columns.where(name: :age).first c.create_index! 生成create index 语句: (8764.0ms) CREATE INDEX CONCURRENTLY IF NOT EXISTS "8_btree_42_age" ON sl_rows USING BTREE (sl_table_id, CAST ((data ->> '42') AS int...
* * One example is end of transaction, so we must wait for any transactions * that are currently in commit critical sections. If an xact inserted * its commit record into XLOG just before the REDO point, then a crash * restart from the REDO point would not replay that record, which ...
CREATE TABLE example (。 id serial PRIMARY KEY,。 data json. ); 这将在名为example的表中创建一个名为data的JSON列。 3. 插入和查询JSON数据:你可以使用INSERT语句向JSON列中插入数据,也可以使用SELECT语句查询JSON数据。例如: INSERT INTO example (data) VALUES ('{"name": "John", "age": 30}')...
(); DROP FUNCTION __tmp_create_user(); ALTER USER postgres_exporter WITH PASSWORD 'password'; ALTER USER postgres_exporter SET SEARCH_PATH TO postgres_exporter,pg_catalog; -- If deploying as non-superuser (for example in AWS RDS), uncomment the GRANT -- line below and replace <MASTER_...
PostgreSQL是⼀个功能强⼤的开源对象关系数据库管理系统(ORDBMS)。⽤于安全地存储数据; ⽀持最佳做法，并允许在处理请求时检索它们。PostgreSQL(也称为Post-gress-Q-L)由PostgreSQL全球开发集团(全球志愿者团队)开发。它不受任何公司或其他私⼈实体控制。它是开源的，其源代码是免费提供的。PostgreSQL是跨平台...
How much this change improves performance depends on the width of the tuples that are stored. Tuple sizes that are slightly above a power of 2 improve the most. For example, PostgreSQL 14 would round a 36-byte tuple to 64-bytes—close to double the memory that is needed. ...
GRANT SELECT, SHOW VIEW ON mydatabase.`Users` to 'myuser'@`myhost`; GRANT SELECT, SHOW VIEW ON mydatabase.`Visitors` to 'myuser'@`myhost`; 4. Select the statements for only the tables you would like to grant access to and run those queries. For example, if we only wanted to ...