Get all top categories, then only 3 posts for each

Related Posts:

1. WordPress database scalability from the code perspective
2. Performance tips for a large user base [closed]
3. WP_Options ID high
4. WordPress for a very large website
5. WordPress database becoming huge. How to analyze and optimize it? fear of running out of memory
6. Improve or optimize a very slow query
7. WooCommerce with thousands of products – site is very slow – optimize db queries? [closed]
8. Efficiency on displaying random authors based on large database
9. How to solve slow WordPress site caused by attachment_metadata
10. Relationship between performance and database size
11. Database slowdown after update to 3.4.1
12. wp_redirection_404 table has grown to 7GB
13. Which is more efficient? Using usermeta, or creating a new MySQL table?
14. One post carries 30 postmeta values, is this too much?
15. Multiple wp_options tables to share content across installs
16. Improve performance by removing unnecessary database queries
17. fastest replacement DB
18. How to prevent/delay MySQL connections when an object cache is used?
19. Does auto_load to ‘no’ in wp_options improve performance
20. How to combine multiple wp_insert_post into one in order to gain better performance
21. Optimizing function that automatically creates internal links based on post title string
22. Is there anyway to split posts to different databases?
23. Job and Employee Performance Tracking with Product Safety
24. What structure and database storage method should I use for temporary storage that may be written concurrently?
25. Best way to store 1 billion+ posts?
26. Optimize WP site for millions of posts
27. Counting user’s comments – efficient way?
28. Performance bug – slow DB query
29. Mysql Queries per Visit – Crazy High
30. What is an ORM, how does it work, and how should I use one? [closed]
31. What is the difference between an ORM and an ODM?
32. What is this JavaScript “require”?
33. Rename a table in MySQL
34. How should I tackle –secure-file-priv in MySQL?
35. What is this JavaScript “require”?
36. What is “Advanced” SQL?
37. What’s the difference between identifying and non-identifying relationships?
38. Can’t connect to MySQL server on ‘127.0.0.1’ (10061) (2003)
39. Can’t connect to MySQL server on ‘127.0.0.1’ (10061) (2003)
40. Can’t connect to MySQL server on ‘127.0.0.1’ (10061) (2003)
41. What are the differences between B trees and B+ trees?
42. MySQL SELECT increment counter
43. How to resolve ORA-011033: ORACLE initialization or shutdown in progress
44. Example of a strong and weak entity types
45. Oracle SQL query for Date format
46. phpMyAdmin – Error > Incorrect format parameter?
47. Strange Characters in database text: Ã, Ã, ¢, â‚ €,
48. Difference between partition key, composite key and clustering key in Cassandra?
49. How SID is different from Service name in Oracle tnsnames.ora
50. What is a relation in database terminology?
51. Failed to connect to mysql at 127.0.0.1:3306 with user root access denied for user ‘root’@’localhost'(using password:YES)
52. Database vs File system storage
53. Can I have multiple primary keys in a single table?
54. Exclude Statement in SQL
55. How do you query for “is not null” in Mongo?
56. What is a file based database?
57. Is it fine to have foreign key as primary key?
58. Storing Images in DB – Yea or Nay?
59. Using wpdb to connect to a separate database
60. how to Optimize WordPress database for 10 million post? [duplicate]
61. MySQL Database User: Which Privileges are needed?
62. Why is my database import losing text widget data?
63. Database synchronization between dev/staging and production
64. Keeping WP database synced across multiple developers using git
65. WPDB Insert or if exists Update
66. Multiple developers / editors working on a site in progress
67. How can I make updates to a site, on a development copy, but then move updates back without overriding live site’s evolving database?
68. get_results using wpdb
69. Will it break my site if I delete all transient records in wp_options table?
70. Checking if Database Table exists
71. Why WordPress choose data serialization over json_encode?
72. Delete all posts of a custom post type—efficiently
73. What’s the simplest way to backup my WordPress database?
74. WordPress (MyISAM) database is slow, should I switch to InnoDB?
75. $wpdb won’t insert NULL into table column
76. Performance of my permalink structure?
77. Relaunch 4.2 utf8mb4 database upgrade
78. Fastest way (least amount of steps) to locally import a remote database using WP-CLI
79. Safest way to bulk delete post revisions
80. Please explain how WordPress works with MySQL character set and collation at a low level
81. Solution for database version control and deployment?
82. The MySQL alternatives: Do Percona Server and MariaDB work well with WordPress, and do they make WordPress go better?
83. How many users can WordPress handle?
84. Get error messages when $wpdb->insert() returns false?
85. Detecting errors generated by $wpdb->get_results()
86. Staging sites, how do you manage synchronising updates in the DB?
87. Does dbDelta delete columns as well?
88. How to get the post publish date outside the loop?
89. MariaDB as a backend database
90. wpdb update add current timestamp not working
91. Site stuck in “Database Update Required” loop
92. How to fetch Data in WordPress using MySQLi or $wpdb
93. WordPress Database lost auto increment
94. Count & Display Database Queries
95. Connect to database using wordpress wp-config file
96. How can I make a WordPress database portable and url independent?
97. Are There Any Plans for WordPress to Support Databases Other Than MySQL?
98. wpdb->insert multiple record at once
99. How to migrate a HTTPS WordPress installation to localhost?
100. Two WordPress sites sharing the same content