sqlite table unique
跳到 UNIQUE constraints — A set of SQL constraints for each table. SQLite supports UNIQUE, NOT NULL, CHECK and FOREIGN KEY constraints. Optionally, ... ,A "uniqueness constraint" is an explicit UNIQUE or PRIMARY KEY constraint within the CREATE TABLE statement, or a unique index. UPSERT does not . ,SQLite - UNIQUE Constraint - The UNIQUE Constraint prevents two records from having identical values in a particular column. In the CUSTOMERS table, ... ,Fifth, specify the table constraints such as PRIMARY KEY , FOREIGN KEY , UNIQUE , and CHECK constraints. Finally, optionally use the WITHOUT ROWID option. ,2019年9月6日 — SQLite FAQ: How do I create a UNIQUE constraint on multiple fields in a SQLite database table? Just specify the unique constraint in your ... ,SELECT DISTINCT select_list FROM table;. In this syntax: First, the DISTINCT clause must appear immediately after the SELECT keyword. Second, ... ,2010年4月24日 — Put the UNIQUE declaration within the column definition section; working example: CREATE TABLE a ( i INT, j INT, UNIQUE(i, j) ON CONFLICT ... ,CREATE TABLE table_name( ..., UNIQUE(column_name) );. The following illustrates how to define a UNIQUE constraint for multiple columns: CREATE ... ,UNIQUE Constraint: 確保所有列中的值是不同(唯一)的。 PRIMARY Key: ... 在SQLite ALTER TABLE命令允許用戶重命名表或現有表添加一個新的列。這是不可能的 ... ,Syntax. The syntax to add a unique constraint to a table in SQLite is: PRAGMA foreign_keys=off; BEGIN TRANSACTION; ALTER TABLE table_name RENAME TO ...
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 sqlite table unique 相關參考資料
create table - SQLite
跳到 UNIQUE constraints — A set of SQL constraints for each table. SQLite supports UNIQUE, NOT NULL, CHECK and FOREIGN KEY constraints. Optionally, ... https://sqlite.org Search SQLite Documentation
A "uniqueness constraint" is an explicit UNIQUE or PRIMARY KEY constraint within the CREATE TABLE statement, or a unique index. UPSERT does not . https://www.sqlite.org SQLite - UNIQUE Constraint - Tutorialspoint
SQLite - UNIQUE Constraint - The UNIQUE Constraint prevents two records from having identical values in a particular column. In the CUSTOMERS table, ... https://www.tutorialspoint.com SQLite Create Table with Examples - SQLite Tutorial
Fifth, specify the table constraints such as PRIMARY KEY , FOREIGN KEY , UNIQUE , and CHECK constraints. Finally, optionally use the WITHOUT ROWID option. https://www.sqlitetutorial.net SQLite FAQ: How to create a unique constraint on multiple ...
2019年9月6日 — SQLite FAQ: How do I create a UNIQUE constraint on multiple fields in a SQLite database table? Just specify the unique constraint in your ... https://alvinalexander.com SQLite SELECT DISTINCT - Removing Duplicate in Result Set
SELECT DISTINCT select_list FROM table;. In this syntax: First, the DISTINCT clause must appear immediately after the SELECT keyword. Second, ... https://www.sqlitetutorial.net SQLite table constraint - unique on multiple columns - Stack ...
2010年4月24日 — Put the UNIQUE declaration within the column definition section; working example: CREATE TABLE a ( i INT, j INT, UNIQUE(i, j) ON CONFLICT ... https://stackoverflow.com SQLite UNIQUE Constraint - SQLite Tutorial
CREATE TABLE table_name( ..., UNIQUE(column_name) );. The following illustrates how to define a UNIQUE constraint for multiple columns: CREATE ... https://www.sqlitetutorial.net SQLite 約束- SQLite教學 - 極客書
UNIQUE Constraint: 確保所有列中的值是不同(唯一)的。 PRIMARY Key: ... 在SQLite ALTER TABLE命令允許用戶重命名表或現有表添加一個新的列。這是不可能的 ... http://tw.gitbook.net SQLite: Unique Constraints - TechOnTheNet
Syntax. The syntax to add a unique constraint to a table in SQLite is: PRAGMA foreign_keys=off; BEGIN TRANSACTION; ALTER TABLE table_name RENAME TO ... https://www.techonthenet.com |