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Add CREATE USER (#1381) 

Co-authored-by: Rico Sta. Cruz <rstacruz@users.noreply.github.com>
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Bryan Dady 2020-07-05 04:59:47 -06:00 committed by GitHub
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mysql.md
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@ -1,62 +1,33 @@
---
title: MySQL
updated: 2020-01-03
updated: 2020-03-09
layout: 2017/sheet
category: Databases
---
### Create / Open / Delete Database
```sql
CREATE DATABASE dbNameYouWant
CREATE DATABASE dbNameYouWant CHARACTER SET utf8
USE dbNameYouWant
DROP DATABASE dbNameYouWant
ALTER DATABASE dbNameYouWant CHARACTER SET utf8
```
### Backup Database to SQL File
```bash
mysqldump -u Username -p dbNameYouWant > databasename_backup.sql
```
### Restore from backup SQL File
```bash
mysql - u Username -p dbNameYouWant < databasename_backup.sql
```
### Repair Tables After Unclean Shutdown
```bash
mysqlcheck --all-databases
mysqlcheck --all-databases --fast
```
### Browsing
```sql
SHOW DATABASES
SHOW TABLES
SHOW FIELDS FROM table / DESCRIBE table
SHOW CREATE TABLE table
SHOW PROCESSLIST
KILL process_number
SHOW DATABASES;
SHOW TABLES;
SHOW FIELDS FROM table / DESCRIBE table;
SHOW CREATE TABLE table;
SHOW PROCESSLIST;
KILL process_number;
```
### Select
```sql
SELECT * FROM table
SELECT * FROM table1, table2, ...
SELECT field1, field2, ... FROM table1, table2, ...
SELECT * FROM table;
SELECT * FROM table1, table2;
SELECT field1, field2 FROM table1, table2;
SELECT ... FROM ... WHERE condition
SELECT ... FROM ... WHERE condition GROUPBY field
SELECT ... FROM ... WHERE condition GROUPBY field HAVING condition2
SELECT ... FROM ... WHERE condition ORDER BY field1, field2
SELECT ... FROM ... WHERE condition ORDER BY field1, field2 DESC
SELECT ... FROM ... WHERE condition LIMIT 10
SELECT ... FROM ... WHERE condition GROUPBY field;
SELECT ... FROM ... WHERE condition GROUPBY field HAVING condition2;
SELECT ... FROM ... WHERE condition ORDER BY field1, field2;
SELECT ... FROM ... WHERE condition ORDER BY field1, field2 DESC;
SELECT ... FROM ... WHERE condition LIMIT 10;
SELECT DISTINCT field1 FROM ...
SELECT DISTINCT field1, field2 FROM ...
```
@ -64,8 +35,8 @@ SELECT DISTINCT field1, field2 FROM ...
### Select - Join
```sql
SELECT ... FROM t1 JOIN t2 ON t1.id1 = t2.id2 WHERE condition
SELECT ... FROM t1 LEFT JOIN t2 ON t1.id1 = t2.id2 WHERE condition
SELECT ... FROM t1 JOIN t2 ON t1.id1 = t2.id2 WHERE condition;
SELECT ... FROM t1 LEFT JOIN t2 ON t1.id1 = t2.id2 WHERE condition;
SELECT ... FROM t1 JOIN (t2 JOIN t3 ON ...) ON ...
```
@ -83,10 +54,39 @@ condition1 AND condition2
condition1 OR condition2
```
### Create / Open / Delete Database
```sql
CREATE DATABASE DatabaseName;
CREATE DATABASE DatabaseName CHARACTER SET utf8;
USE DatabaseName;
DROP DATABASE DatabaseName;
ALTER DATABASE DatabaseName CHARACTER SET utf8;
```
### Backup Database to SQL File
```bash
mysqldump -u Username -p dbNameYouWant > databasename_backup.sql
```
### Restore from backup SQL File
```bash
mysql - u Username -p dbNameYouWant < databasename_backup.sql;
```
### Repair Tables After Unclean Shutdown
```bash
mysqlcheck --all-databases;
mysqlcheck --all-databases --fast;
```
### Insert
```sql
INSERT INTO table1 (field1, field2, ...) VALUES (value1, value2, ...)
INSERT INTO table1 (field1, field2) VALUES (value1, value2);
```
### Delete
@ -101,9 +101,9 @@ DELETE FROM table1, table2 FROM table1, table2 WHERE table1.id1 =
### Update
```sql
UPDATE table1 SET field1=new_value1 WHERE condition
UPDATE table1 SET field1=new_value1 WHERE condition;
UPDATE table1, table2 SET field1=new_value1, field2=new_value2, ... WHERE
table1.id1 = table2.id2 AND condition
table1.id1 = table2.id2 AND condition;
```
### Create / Delete / Modify Table
@ -111,11 +111,10 @@ UPDATE table1, table2 SET field1=new_value1, field2=new_value2, ... WHERE
#### Create
```sql
CREATE TABLE table (field1 type1, field2 type2, ...)
CREATE TABLE table (field1 type1, field2 type2, ..., INDEX (field))
CREATE TABLE table (field1 type1, field2 type2, ..., PRIMARY KEY (field1))
CREATE TABLE table (field1 type1, field2 type2, ..., PRIMARY KEY (field1,
field2))
CREATE TABLE table (field1 type1, field2 type2);
CREATE TABLE table (field1 type1, field2 type2, INDEX (field));
CREATE TABLE table (field1 type1, field2 type2, PRIMARY KEY (field1));
CREATE TABLE table (field1 type1, field2 type2, PRIMARY KEY (field1,field2));
```
```sql
@ -130,18 +129,18 @@ CREATE TABLE table1 (fk_field1 type1, fk_field2 type2, ...,
```
```sql
CREATE TABLE table IF NOT EXISTS (...)
CREATE TABLE table IF NOT EXISTS;
```
```sql
CREATE TEMPORARY TABLE table (...)
CREATE TEMPORARY TABLE table;
```
#### Drop
```sql
DROP TABLE table
DROP TABLE IF EXISTS table
DROP TABLE table;
DROP TABLE IF EXISTS table;
DROP TABLE table1, table2, ...
```
@ -182,20 +181,22 @@ CREATE TABLE table (..., FOREIGN KEY (field1, field2) REFERENCES table2
### Users and Privileges
```sql
CREATE USER 'user'@'localhost';
GRANT ALL PRIVILEGES ON base.* TO 'user'@'localhost' IDENTIFIED BY 'password';
GRANT SELECT, INSERT, DELETE ON base.* TO 'user'@'localhost' IDENTIFIED BY 'password';
REVOKE ALL PRIVILEGES ON base.* FROM 'user'@'host'; -- one permission only
REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'user'@'host'; -- all permissions
FLUSH PRIVILEGES;
```
```sql
SET PASSWORD = PASSWORD('new_pass')
SET PASSWORD FOR 'user'@'host' = PASSWORD('new_pass')
SET PASSWORD = OLD_PASSWORD('new_pass')
SET PASSWORD = PASSWORD('new_pass');
SET PASSWORD FOR 'user'@'host' = PASSWORD('new_pass');
SET PASSWORD = OLD_PASSWORD('new_pass');
```
```sql
DROP USER 'user'@'host'
DROP USER 'user'@'host';
```
Host ‘%’ indicates any host.