假设有一个表格sales,包含销售额和总销售额字段 -- 计算某个销售额在总销售额中的百分比 -- 查询特定销售额的百分比 SELECT (sales_amount / total_sales) * 100 AS percentage FROM sales WHERE sales_id = 1; -- 查询所有销售额的百分比 SELECT (sales_amount / total_sales) * 100 AS percentage FROM...
percentage-指定通过概要分析确定的列数据质量问题的百分比。 CREATE TABLE 语句: CREATE TABLE asset_columns_quality_score_problems(asset_id varchar(128) NOT NULL,container_id varchar(36) NOT NULL,column_name varchar(256) NOT NULL,problem_id varchar(128) NOT NULL,num_of_findin...
#!/bin/bash # 常量值(假设在计算前已经提供了 RAM 和相关配置) TOTAL_RAM_MB=8000 CURRENT_CONNECTION_LIMIT=1000 CURRENT_WORK_MEM_MB=16 BASE_OVERHEAD_MB=8 HASH_MEM_MULTIPLIER=2 OS_MEMORY_USAGE_PERCENTAGE=25 MAINTENANCE_OS_MEMORY_USAGE_PERCENTAGE=15 # 根据总 RAM 和使用百分比计算内存分配 BUFFER...
calls, round((100 * total_time / sum(total_time::numeric) OVER ())::numeric, 2) AS percentage_cpu FROM pg_stat_statements ORDER BY total_time DESC LIMIT 3; 6、分析评估SQL执行情况 EXPLAIN ANALYZE SELECT * FROM product 7、查看当前长时间执行却不结束的SQL select datname, usename, client...
ROUND((ps.product_quantity::float / ts.total_quantity) * 100, 2) AS percentage FROM product_sales ps, total_sales ts; MYSQL: WITH total_sales AS ( SELECT SUM(quantity) AS total_quantity FROM sales ), product_sales AS ( SELECT p.product_id, p.product_name, SUM(s.quantity) AS produ...
round((100 * total_time / sum(total_time::numeric) OVER ())::numeric, 2) AS percentage_cpu FROM pg_stat_statements ORDER BY total_time DESC LIMIT 3; 6、分析评估SQL执行情况 EXPLAIN ANALYZE SELECT * FROM product 7、查看当前长时间执行却不结束的SQL ...
count_percentage | 70.10622154779969 record_size | 45276 record_size_percentage | 67.49552772808586 fpi_size | 4216068 fpi_size_percentage | 97.18706086725605 combined_size | 4261344 combined_size_percentage | 96.73493181657214 -[ RECORD 2 ]---+--- resource_manager/record_type | Transaction count |...
round((100* total_time /sum(total_time::numeric)OVER())::numeric,2)ASpercentage_cpu FROMpg_stat_statements ORDERBYtotal_timeDESC LIMIT3; 6、分析评估SQL执行情况 EXPLAINANALYZESELECT*FROMproduct 7、查看当前长时间执行却不结束的SQL selectdatname, usename, client_addr, application_name, state, ba...
Which of the following tools do you use most often to connect to PostgreSQL? Responses to this question are consistent with results from 2022. The highest percentage of respondents said they use psql to connect to the PostgreSQL database. Other top answers include pgAdmin, DBeaver, Datagrip, ...
round((100 * total_time / sum(total_time::numeric) OVER ())::numeric, 2) AS percentage_cpu FROM pg_stat_statements ORDER BY total_time DESC LIMIT 3; 6、分析评估SQL执行情况 EXPLAIN ANALYZE SELECT * FROM product 7、查看当前长时间执行却不结束的SQL ...