tableColumnAction ::= { ADD [ COLUMN ] [ IF NOT EXISTS ] <col_name> <col_type> [ { DEFAULT <default_value> | { AUTOINCREMENT | IDENTITY } /* AUTOINCREMENT (or IDENTITY) is supported only for */ /* columns with numeric data types (NUMBER, INT, FLOAT, etc.). */ /* Also, ...
ALTERTABLE<name>{ALTER|MODIFY}[(][COLUMN]<col1_name>DROPDEFAULT,[COLUMN]<col1_name>SETDEFAULT<seq_name>.NEXTVAL,[COLUMN]<col1_name>{[SET]NOTNULL|DROPNOTNULL},[COLUMN]<col1_name>[[SETDATA]TYPE]<type>,[COLUMN]<col1_name>COMMENT'<string>',[COLUMN]<col1_name>UNSETCOMMENT[,[COLUMN]<c...
SQLCREATETABLEmy_database.my_schema.my_table(idINTAUTOINCREMENT,nameSTRING,created_atTIMESTAMP_LTZDEFAULTCURRENT_TIMESTAMP,PRIMARYKEY(id)); 1. 2. 3. 4. 5. 6. 7. 修改表 添加列或更改表结构可以通过ALTER TABLE命令来完成: 复制 SQLALTERTABLEmy_database.my_schema.my_tableADDCOLUMNemailSTRING; ...
SQLCREATETABLEmy_database.my_schema.my_table(idINTAUTOINCREMENT,nameSTRING,created_atTIMESTAMP_LTZDEFAULTCURRENT_TIMESTAMP,PRIMARYKEY(id)); 1. 2. 3. 4. 5. 6. 7. 修改表 添加列或更改表结构可以通过ALTER TABLE命令来完成: 复制 SQLALTERTABLEmy_database.my_schema.my_tableADDCOLUMNemailSTRING; ...
How to Add a Default Value to a Column -> How to Add a Column in Snowflake using Alter Table -> How to Add a NOT NULL Constraint -> How to Alter Sequence -> How to Avoid Gaps in Data -> Collaborate on Snowflake data with your team ...
❯ python -c 'import sqlglot; e = sqlglot.parse_one("ALTER TABLE table1 MODIFY COLUMN name1 SET TAG foo='bar'", read="snowflake"); print(repr(e))' Traceback (most recent call last): File "<string>", line 1, in <module> File "/Users/tekumara/code3/sqlglot/sqlglot/__...
--run on snowflakeUSE ROLE ACCOUNTADMIN;SELECTSYSTEM$SHOW_ACTIVE_BEHAVIOR_CHANGE_BUNDLES();--[{"name":"2024_02","isDefault":true,"isEnabled":true},{"name":"2024_03","isDefault":false,"isEnabled":false}];--SELECT SYSTEM$DISABLE_BEHAVIOR_CHANGE_BUNDLE('2024_03'); -- run this if ...
并且通过表里面原来一个未使用的字段来区分不同的业务。...于是想到通过default来修改列的默认值: alter table A modify column biz default 'old' comment '业务标识 old-老业务, new-新业务'...看起来mysql和oracle在default的语义上处理不一样,对于oracle,会将历史为null的值刷成default指定的值。...总结 ...
created_at TIMESTAMP_LTZ DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id) ); Modifying Tables Adding columns or altering table structures can be accomplished with theALTER TABLEcommand: SQL ALTER TABLE my_database.my_schema.my_table ADD COLUMN email STRING; ...
-- table in an already-clustered manner. orderbysession_start ); altertablemy_database.my_schema.my_table clusterby(session_start); Automatic clustering isenabled by default in Snowflake today, no action is needed to make use of it. Though there is anautomatic_clusteringconfig, it has no ...