Apache ShardingSphere 5.0.0-alpha Documenttable with the same sharding rules, for example, t_order and t_order_item are both sharded by order_id, so they are binding tables with each other. Carte‐ sian product correlation will not appear in the t_order o JOIN t_order_item i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); When binding table relations are not configured, suppose the sharding key order_id routes value 10 to sharding 0 and value JOIN t_order_item_0 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM t_order_0 o JOIN t_order_item_1 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM0 码力 | 311 页 | 2.09 MB | 1 年前3
sqlalchemy tutorialColumn, Integer, String, MetaData meta = MetaData() students = Table('students', meta, Column('id', Integer, primary_key=True), Column('name', String), Column('lastname', String), ) The create_all() create_engine('sqlite:///college.db', echo=True) meta=MetaData() students = Table('students', meta, Column('id', Integer, primary_key=True), Column('name', String), Column('lastname', String), ) meta.create_all(engine) creation as follows: CREATE TABLE students ( id INTEGER NOT NULL, name VARCHAR, lastname VARCHAR, PRIMARY KEY (id) ) The college.db will be created in current working0 码力 | 92 页 | 1.77 MB | 1 年前3
Apache ShardingSphere 5.1.2 Documentaffect query efficiency. For example, t_order and t_order_item are both sharded by order_id, and use order_id to correlate, so they are binding tables with each other. Cartesian product correlation will t_order o JOIN t_order_item i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); When binding table relations are not configured, suppose the sharding key order_id routes value 10 to sharding 0 and value JOIN t_order_item_0 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM t_order_0 o JOIN t_order_item_1 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM0 码力 | 503 页 | 3.66 MB | 1 年前3
Apache ShardingSphere 5.1.1 Documentaffect query efficiency. For example, t_order and t_order_item are both sharded by order_id, and use order_id to correlate, so they are binding tables with each other. Cartesian product correlation will t_order o JOIN t_order_item i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); When binding table relations are not configured, suppose the sharding key order_id routes value 10 to sharding 0 and value JOIN t_order_item_0 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM t_order_0 o JOIN t_order_item_1 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM0 码力 | 458 页 | 3.43 MB | 1 年前3
Apache ShardingSphere 5.2.0 Documentif the t_order table and t_order_item table are both sharded according to order_id and are correlated using order_id, the two tables are binding tables. The multi‐table associated queries between binding t_order_item i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); In the case where no binding table relationships are being set, assume that the sharding key order_id routes the value 10 to slice JOIN t_order_item_0 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM t_order_0 o JOIN t_order_item_1 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM0 码力 | 483 页 | 4.27 MB | 1 年前3
Apache ShardingSphere 5.2.1 Documentif the t_order table and t_order_item table are both sharded according to order_id and are correlated using order_id, the two tables are binding tables. The multi‐table associated queries between binding t_order_item i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); In the case where no binding table relationships are being set, assume that the sharding key order_id routes the value 10 to slice JOIN t_order_item_0 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM t_order_0 o JOIN t_order_item_1 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM0 码力 | 523 页 | 4.51 MB | 1 年前3
Apache ShardingSphere 5.0.0 Documenttable with the same sharding rules. for example, t_order and t_order_item are both sharded by order_id, so they are binding tables with each other. Carte‐ sian product correlation will not appear in the t_order o JOIN t_order_item i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); When binding table relations are not configured, suppose the sharding key order_id routes value 10 to sharding 0 and value ON o.order_id=i.order_id WHERE o. order_id in (10, 11); 4.2. Sharding 24 Apache ShardingSphere document, v5.0.0 SELECT i.* FROM t_order_0 o JOIN t_order_item_1 i ON o.order_id=i.order_id WHERE o. order_id0 码力 | 403 页 | 3.15 MB | 1 年前3
SQLite Tutorialcolumn sqlite>.timer on sqlite> Above setting will produce the output in the following format: ID NAME AGE ADDRESS SALARY ---------- ---------- ---------- ---------- COMPANY table with ID as primary key and NOT NULL are the constraints showing that these fields can not be NULL while creating records in this table: sqlite> CREATE TABLE COMPANY( ID INT PRIMARY KEY subsequent chapters: sqlite> CREATE TABLE DEPARTMENT( ID INT PRIMARY KEY NOT NULL, DEPT CHAR(50) NOT NULL, EMP_ID INT NOT NULL ); CHAPTER 9 TUTORIALS POINT0 码力 | 172 页 | 1.27 MB | 1 年前3
Apache ShardingSphere 5.4.1 Documentif the t_order table and t_order_item table are both sharded according to order_id and are correlated using order_id, the two tables are binding tables. The multi‐table associated queries between binding t_order_item i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); In the case where no binding table relationships are being set, assume that the sharding key order_id routes the value 10 to slice JOIN t_order_item_0 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM t_order_0 o JOIN t_order_item_1 i ON o.order_id=i.order_id WHERE o. order_id in (10, 11); SELECT i.* FROM0 码力 | 572 页 | 3.73 MB | 1 年前3
MYBATIS Quick Guidefollowing syntax − mysql> DROP TABLE IF EXISTS details.student; CREATE TABLE details.student( ID int(10) NOT NULL AUTO_INCREMENT, NAME varchar(100) NOT NULL, BRANCH varchar(255) NOT NULL, PERCENTAGE int(3) NOT NULL, PHONE int(10) NOT NULL, EMAIL varchar(255) NOT NULL, PRIMARY KEY ( ID ) ); MyBatis Eclipse Setup If you want to develop MyBatis Application using eclipse, carry out theid = "environment_id"> 0 码力 | 34 页 | 301.72 KB | 1 年前3
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