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Select database USE database; Create table CREATE TABLE [IF NOT EXISTS] table_name ( column_name data_type, ... ); View table SHOW TABLES [FROM db_name] [LIKE 'pattern' | WHERE expr]; View table structure SHOW COLUMNS FROM tbl_name; insert record INSERT [INTO] tbl_name [(col_name, ...)] VALUES ...

SQL ite3 database C language simple operation basic data search (3) Overview: the creation, addition, deletion, and modification of sqlite3 database have all been mentioned. Today, it is the search of the database and the application of the core of database comparison. If the previous API is used for execution, because there is a return value ...

I've come into contact with some relatively new things recently. Record them First post the official API address of wechat and feel the charm of wechat... https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_6 After learning some notes about wechat download bill, we will officially start   The following is the specific implementation ...

background Recently, I was in charge of transferring company data from Oracle to PG; old platform database: Oracle11g; new platform database: PostgreSQL12. Due to the change of platform statistical rules, all the game data being promoted cannot be migrated; it can only run on the old platform. The payment data interface is upgraded, and the da ...

ProxySQL cluster Experimental environment informationMySQL master-slave information IP 1 role 188.188.0.68 Node1 188.188.0.69 Node2 188.188.0.70 Node3 ProxySQL service node IP 1 role 188.188.0.68 Node 68 188.188.0.71 Node 71 ProxySQL version: 2.0.3-29-g00f26d5 1, ProxySQL service installation Install the same version of P ...

MGR multi main mode configuration load balancing Experimental environment informationMySQL master-slave information IP role 188.188.0.68 Node1 188.188.0.69 Node2 188.188.0.70 Node3 ProxySQL version: 2.0.3-29-g00f26d5 >>>Server and user configuration<<< 1. Add backend database server Admin> SELECT * FROM mysql_s ...

After MySQL is upgraded to 8.0, how to solve the problem of PHP connection error? As a senior MySQL ticket pal, I've been blowing water for 8.0 recently. We know that several MySQL courses have been upgraded to version 8.0 since last year. My VPS has been trying to upgrade for a long time, but the PHP version is too low. I'm worried about ...

14_ProxySQL_Configuration Note: during the writing time of the article from April 201904 to may 201905, subsequent official updates in github were not written ~~How to configure proxysql in the simplest way This simple HOWTO describes how to configure some components of ProxySQL step by step. Note, however, that this is not a complet ...

13. Clickhouse support for proxysql configuration Note: during the writing time of the article from April 201904 to may 201905, subsequent official updates in github were not written ~~ClickHouse Support 1, Preface ProxySQL support for ClickHouse is still in the experimental phase and may change. 1. How to enable support for ...

Ansible playbook Vault encryption details and use cases   Host Planning   Add user account Explain: 1. Login accounts used by operations and maintenance personnel; 2. All businesses are placed under / app / in the "home directory of yun users" to avoid the disorder of business data; 3. This user is also used by ansible because almo ...