PLSQL中游标常常用于联机交易，调用存储过程所返回的结果集也常用游标去存储的。游标的定义语句比较简单，如 cursor my_cursor is select 1 from dual。openGauss中不兼容游标定义的IS关键字，需要改写为FOR。postgres=# CURSOR prd_cursor IS select name from product;
"skipColumnName": { "SCHEMA1.TAB_01.COL1": 1, "SCHEMA1.TAB_01.COL2": 2 }, "templateSeqName": "{{.TabName}}_{{.ColName}}_SEQ", "charAppendEmptyString": false, "tableOptions": {}, "indexOptions": {} } }, "object": { "tables": [], "schemas": [ "XXXXX" ], "exclu...
11.drop a column sql> alter table table_name drop column comments cascade constraints checkpoint 1000; alter table table_name drop columns continue; 12.mark a column as unused sql> alter table table_name set unused column comments cascade constraints; alter table table_name drop unused columns c...
SELECT 'DROP TABLE '|| table_name ||';' FROM user_tables; SPOOL OFF b. 以SCOTT用户登录数据库 SQLPLUS > @ …..gen_dorp_table.sql c. 在c盘根目录下会生成文件drop_table.sql文件,包含删除所有表的语句,如下所示: DROP TABLE DEPT; DROP TABLE EMP; DROP TABLE PARENT; DROP TABLE STAT_VENDER...
The syntax to create one is:Copy code snippet Copied to Clipboard Error: Could not Copy Copied to Clipboard Error: Could not Copy create blockchain table blockchain_tab ( audit_id integer not null primary key, audit_timestamp timestamp not null, audit_data clob not null ) no drop u...
COL[UMN] [{ column|expr} [ option ...]] Option选项可以是如下的子句: ALI[AS] alias CLE[AR] FOLD_A[FTER] FOLD_B[EFORE] FOR[MAT] format HEA[DING] text JUS[TIFY] {L[EFT]|C[ENTER]|C[ENTRE]|R[IGHT]} LIKE { expr|alias} ...
数据库应用最核心的部分就是SQL语言。SQL语言是非过程化编程语言,主要分为数据查询语言(SELECT)、数据操作语言(INSERT、UPDATE和DELETE)、事务控制语言(COMMIT、SAVEPOINT、ROLLBACK)、权限控制语言(GRANT、REVOKE)、数据定义语言(CREATE、ALTER和DROP)、指针控制语言(DECLARE CURSOR)。
SQL语言是非过程化编程语言,主要分为数据查询语言(SELECT)、数据操作语言(INSERT、UPDATE和DELETE)、事务控制语言(COMMIT、SAVEPOINT、ROLLBACK)、权限控制语言(GRANT、REVOKE)、数据定义语言(CREATE、ALTER和DROP)、指针控制语言(DECLARE CURSOR)。 SQL语法的标准是由ANSI和国际标准化组织(ISO)作为ISO/IEC 9075标准维护,...
Syntax Highlighting Code Insight Table alias insight Single Statement Execution Script Execution Code Formatting Command History Explain Plan HTP and OWA output Bind Variable Support Drag and Drop into your SQL Snippets Tables/Materialized Views (bring over full select statement) ...
Syntax Highlighting Code Insight Table alias insight Single Statement Execution Script Execution Code Formatting Command History Explain Plan HTP and OWA output Bind Variable Support Drag and Drop into your SQL Snippets Tables/Materialized Views (bring over full select statement) Functions/Procedures (bri...