# 创建一个表mydb=# create table testtable1(id int, tname varchar(20));mydb=# insert into testtable1 select n,'myname_'||n from generate_series(1,5000000) n;mydb=# explain analyze select * from testtable1 where tname='myname_10';QUERY PLAN --- Gather (cost=1000.00..58878.99 ...
View your logs and query statistics in one single platform and monitor your key metrics in real-time. Trend analysis Analyze meaningful trends and get insights into your query performance history. Tuning recommendations Collect detailed insights and receive tuning recommendations for your per-table autov...
\ef [FUNCNAME [LINE]] edit function definition with external editor \ev [VIEWNAME [LINE]] edit view definition with external editor \p show the contents of the query buffer \r reset (clear) the query buffer \s [FILE] display history or save it to file \w FILE write query buffer to ...
(a)在对象浏览器中选择准备导出的表,右键选择[Query data],在弹出的窗口中,点击[Fetch last page]按钮,将所有数据显示出来; (b)选择数据行,点击右键,选择[Export Results]–》[CSV file],则被选中数据行将被导出。 (10)如何直接编辑某个表中的数据? (a)打开一个SQL Window,输入如下语句: select * from t...
\crosstabview [COLUMNS] execute query and display resultsincrosstab \errverbose show most recent error message at maximum verbosity \g [(OPTIONS)] [FILE] execute query (and send results to file or |pipe); \g with no arguments is equivalent to a semicolon ...
5 InfluxDB Alternatives for Your Time-Series Data8 Reasons to Choose Timescale as Your InfluxDB Alternative What InfluxDB Got Wrong InfluxQL, Flux, and SQL: Which Query Language Is Best? (With Cheatsheet)TimescaleDB vs. InfluxDB: Purpose Built Differently for Time-Series Data Timescale basics...
Query Planner to better handle redundant IS [NOT] NULL: When you create a table you can create a column, select the name and type and whether it can allow NULLS or not—and you can put a NOT NULL constraint on the column. When you write a query you might write ...
The Query tool features two panels: The upper panel displays the SQL editor. You can use the panel to enter, edit, or execute a query. It also shows theHistorytab, which you can use to view the queries that ran in the session. You can use the scratch pad to hold text snippets durin...
Listing 11. The execution plan for the query with the IN operator. From PostgreSQL point of view, the IN operator is similar to the ANY operator for which an array is provided. So, it’s required to detect a function that accepts a string as an input parameter and returns an array. In...
Postgres lock monitoring with the pg_locks view Counting how many locks are not granted Finding the blocking process when a query is waiting for a lock Understanding lightweight locks (LWLocks…Continue reading 5mins of Postgres E24: Tuning the Postgres statistics target & understanding selectivity ...