-
Notifications
You must be signed in to change notification settings - Fork 0
/
Book Store indexes
76 lines (55 loc) · 1.17 KB
/
Book Store indexes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
SELECT * FROM customers
LIMIT 10;
SELECT * FROM orders
LIMIT 10;
SELECT * FROM books
LIMIT 10;
SELECT *
FROM pg_Indexes
WHERE tablename = 'customers';
SELECT *
FROM pg_Indexes
WHERE tablename = 'books';
SELECT *
FROM pg_Indexes
WHERE tablename = 'orders';
CREATE INDEX customer_id_idx ON orders (customer_id);
EXPLAIN ANALYZE SELECT original_language, title, sales_in_millions
FROM books
WHERE original_language = 'French';
SELECT pg_size_pretty(pg_total_relation_size('books'));
CREATE INDEX books_original_language_title_sales_in_millions_idx
ON books (original_language, title, sales_in_millions);
SELECT * FROM customers
LIMIT 10;
SELECT * FROM orders
LIMIT 10;
SELECT * FROM books
LIMIT 10;
SELECT *
FROM pg_Indexes
WHERE tablename = 'customers';
SELECT *
FROM pg_Indexes
WHERE tablename = 'books';
SELECT *
FROM pg_Indexes
WHERE tablename = 'orders';
/*SELECT NOW();
\COPY orders FROM 'orders_add.txt' DELIMITER ',' CSV HEADER;
SELECT NOW();*/
SELECT
*
FROM
pg_Indexes
WHERE
tablename = 'books';
DROP INDEX IF EXISTS books_original_language_title_sales_in_millions_idx;
DROP INDEX IF EXISTS
customer_id_idx;
SELECT
*
FROM
pg_Indexes
WHERE
tablename = 'books';