除了使用 unlock tables 显示释放锁之外,会话持有其他表锁时执行lock table 语句会释放会话之前持有的锁;会话持有其他表锁时执行 start transaction 或者 begin 开启事务时,也会释放之前持有的锁。 共享锁用法: LOCK TABLE table_name [ AS alias_name ] READ 1. 排它锁用法: LOCK TABLE table_name [AS alias_...
Create Table INSERT (CTAS) Demo Table Creation Insert CREATE TABLE <table_name> AS <SELECT Statement>; CREATE TABLE servers_bak AS SELECT * FROM servers; desc servers_bak SELECT COUNT(*) FROM servers_bak; INSERT With Returning Clause Demo Insert With Returning Clause INSERT INTO <table_name>...
|| x.table_name; -- dbms_output.put_line(select_str); EXECUTEIMMEDIATE select_str BULK COLLECTINTOins_tab; l_count := ins_tab.COUNT; UTL_FILE.put_line (log_file, ''); UTL_FILE.put_line (log_file, '-- table name: ' || x.table_name); FORi IN 1 .. l_count LOOP UTL_FIL...
dbms_output.put_line(idx);commit;end; execute immediate用于在块中执行SQL语句(execute immediate 执行DML语句,不会自动commit) 一般方式: declareinsrt_sqlvarchar2(200);begininsrt_sql :='insert into Dishes(DishName,UnitPrice,CategoryId) values(''烧鸡'',23,2)';executeimmediate insrt_sql;commit;end...
Both the statements below will insert NULL value into age column of the student table.INSERT INTO student(id, name) values(102, 'Alex');Or,INSERT INTO Student VALUES(102,'Alex', null);The above command will insert only two column values and the other column is set to null....
前言干货不多说,学到才是自己的!增增,即插入,就是数据库中插入你想保存的数据,是数据库基本操作之一!INSERT语法格式(插入单行数据):INSERT【INTO】 table_or _view 【(column_list)】VALUES data_ valuesinsert[into] <表名> [列名] values <列值>注意:如果省略列名,将依次插入所有列 ...
bypassing the buffer cache. Free space in the existing data is not reused. This alternative enhances performance during insert operations and is similar to the functionality of the Oracle direct-path loader utility, SQL*Loader. When you insert into a table that has been created in parallel mode...
php $dbms='mysql'; //数据库类型 $host='localhost'; //数据库主机名 $dbName='joyous'; //使用的数据库 $user='test'...; //数据库连接用户名 $pass='123456'; //对应的密码 $dsn="$dbms:host=$host;dbname=$dbName"; $table =...array( 't_user' => '用户表', 't_user_info' => ...
`INSERT INTO` 语句的基本语法如下: ```sql INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...); ``` 这里,`table_name` 是目标表的名称,括号内的 `column1, column2, column3, ...` 表示要插入数据的具体列名,而 `VALUES` 后面则是对应列的值...
for (Map.Entry<String, Map<String, Set<String>>> e : writableTableUkMap.entrySet()) { String currentTableName = e.getKey().toUpperCase(); Map<String, Set<String>> currentUniqueKeys = e.getValue(); boolean found = false; for (Set<String> currentUniqueKey : currentUniqueKeys.values()...