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* split up select.md * array-join.md basic refactoring * distinct.md basic refactoring * format.md basic refactoring * from.md basic refactoring * group-by.md basic refactoring * having.md basic refactoring * additional index.md refactoring * into-outfile.md basic refactoring * join.md basic refactoring * limit.md basic refactoring * limit-by.md basic refactoring * order-by.md basic refactoring * prewhere.md basic refactoring * adjust operators/index.md links * adjust sample.md links * adjust more links * adjust operatots links * fix some links * adjust aggregate function article titles * basic refactor of remaining select clauses * absolute paths in make_links.sh * run make_links.sh * remove old select.md locations * translate docs/es * translate docs/fr * translate docs/fa * remove old operators.md location * change operators.md links * adjust links in docs/es * adjust links in docs/es * minor texts adjustments * wip * update machine translations to use new links * fix changelog * es build fixes * get rid of some select.md links * temporary adjust ru links * temporary adjust more ru links * improve curly brace handling * adjust ru as well * fa build fix * ru link fixes * zh link fixes * temporary disable part of anchor checks
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machine_translated | machine_translated_rev | toc_priority | toc_title |
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true | 72537a2d52 |
30 | MySQL |
MySQL
Uzak bir MySQL sunucusunda veritabanlarına bağlanmak ve gerçekleştirmek için izin verir INSERT
ve SELECT
ClickHouse ve MySQL arasında veri alışverişi için sorgular.
Bu MySQL
veritabanı motoru sorguları MySQL sunucusuna çevirir, böylece aşağıdaki gibi işlemleri gerçekleştirebilirsiniz SHOW TABLES
veya SHOW CREATE TABLE
.
Aşağıdaki sorguları gerçekleştiremiyor:
RENAME
CREATE TABLE
ALTER
Veritabanı oluşturma
CREATE DATABASE [IF NOT EXISTS] db_name [ON CLUSTER cluster]
ENGINE = MySQL('host:port', ['database' | database], 'user', 'password')
Motor Parametreleri
host:port
— MySQL server address.database
— Remote database name.user
— MySQL user.password
— User password.
Veri Türleri Desteği
MySQL | ClickHouse |
---|---|
UNSIGNED TINYINT | Uİnt8 |
TINYINT | Int8 |
UNSIGNED SMALLINT | Uınt16 |
SMALLINT | Int16 |
UNSIGNED INT, UNSIGNED MEDIUMINT | Uİnt32 |
INT, MEDIUMINT | Int32 |
UNSIGNED BIGINT | Uİnt64 |
BIGINT | Int64 |
FLOAT | Float32 |
DOUBLE | Float64 |
DATE | Tarihli |
DATETIME, TIMESTAMP | DateTime |
BINARY | FixedString |
Diğer tüm MySQL veri türleri dönüştürülür Dize.
Nullable desteklenir.
Kullanım örnekleri
MySQL tablo:
mysql> USE test;
Database changed
mysql> CREATE TABLE `mysql_table` (
-> `int_id` INT NOT NULL AUTO_INCREMENT,
-> `float` FLOAT NOT NULL,
-> PRIMARY KEY (`int_id`));
Query OK, 0 rows affected (0,09 sec)
mysql> insert into mysql_table (`int_id`, `float`) VALUES (1,2);
Query OK, 1 row affected (0,00 sec)
mysql> select * from mysql_table;
+------+-----+
| int_id | value |
+------+-----+
| 1 | 2 |
+------+-----+
1 row in set (0,00 sec)
Clickhouse'daki veritabanı, MySQL sunucusu ile veri alışverişi:
CREATE DATABASE mysql_db ENGINE = MySQL('localhost:3306', 'test', 'my_user', 'user_password')
SHOW DATABASES
┌─name─────┐
│ default │
│ mysql_db │
│ system │
└──────────┘
SHOW TABLES FROM mysql_db
┌─name─────────┐
│ mysql_table │
└──────────────┘
SELECT * FROM mysql_db.mysql_table
┌─int_id─┬─value─┐
│ 1 │ 2 │
└────────┴───────┘
INSERT INTO mysql_db.mysql_table VALUES (3,4)
SELECT * FROM mysql_db.mysql_table
┌─int_id─┬─value─┐
│ 1 │ 2 │
│ 3 │ 4 │
└────────┴───────┘