database-schema

Is it possible to replicate a single table? Yes this is possible. Have a look at the slave options of the MySQL manual. This still requires to create a complete binlog of the whole database though. To sync specific tables again to one or more slaves rather use pt-table-checksum and then pt-table-sync That should automatically identify the out-of-sync tables and only sync those. Scarecrow I know this is an old question but this is for anyone who comes here looking for an answer: CREATE TABLE table2 LIKE table1; This will create a table with the same format and columns but no data. To transfer

We're using the orm sequelize.js and have defined a model as such: module.exports = function(sequelize, DataTypes) { var Source = sequelize.define('Source', { name: { type: DataTypes.STRING, allowNull: false, unique: true } }, { paranoid: true }); return Source; }; This is deployed to production and sync'd to the database using sequelize.sync . Next step, we add a parameter: module.exports = function(sequelize, DataTypes) { var Source = sequelize.define('Source', { name: { type: DataTypes.STRING, allowNull: false, unique: true }, location: { type: DataTypes.STRING } }, { paranoid: true });

Coming from question “Relation” versus “relationship” What are definitions of "relation" vs. "relationship" in RDBMS (or database theory)? Update: I was somewhat perplexed by comment to my question: "relation is a synonym for table, and thus has a very precise meaning in terms of the schema stored in the computer" Update2: Had I answered incorrectly that question , in terms of RDBMS, having written that relation is one-side direction singular connection-dependence-link, i.e. from one table to another while relationship implies (not necessarily explicitly) more than one link connection in one

Is there a way to grant all privileges to a user on Oracle schema? I tried the following command but it only grants permission on specific tables in a schema. What I want is to give this user all permissions on a given schema. GRANT ALL ON MyTable TO MyUser; Wernfried Domscheit You can do it in a loop and grant by dynamic SQL: BEGIN FOR objects IN ( SELECT 'GRANT ALL ON "'||owner||'"."'||object_name||'" TO MyUser' grantSQL FROM all_objects WHERE owner = 'MY_SCHEMA' AND object_type NOT IN ( --Ungrantable objects. Your schema may have more. 'SYNONYM', 'INDEX', 'INDEX PARTITION', 'DATABASE LINK',

I want to restrict the value of a field in a row of a table to a specific range. Is it possible to restrict my relationship_level field to [0.00 to 1.00] ? At the moment I am using DECIMAL(2,2), it wouldn't allow DECIMAL(1,2) as M must be >= D. I assume a data type of DECIMAL(2,2) will actually allow values from 00.00 up to 99.99? CREATE TABLE relationships ( from_user_id MEDIUMINT UNSIGNED NOT NULL, to_user_id MEDIUMINT UNSIGNED NOT NULL, relationship_level DECIMAL(2,2) UNSIGNED NOT NULL, PRIMARY KEY (from_user_id, to_user_id), FOREIGN KEY (from_user_id) REFERENCES users (user_id) ON DELETE