CREATE VIEW database_name.view_name AS SELECT statement...; SQLite CREATE VIRTUAL TABLE 语句: CREATE VIRTUAL TABLE database_name.table_name USING weblog(access.log);orCREATE VIRTUAL TABLE database_name.table_name USING fts3(); SQLite COMMIT TRANSACTION 语句: COMMIT...
sql-statement ::= BEGIN [ DEFERRED | IMMEDIATE | EXCLUSIVE ] [TRANSACTION [name ] ] sql-statement ::= END [TRANSACTION [name ] ] sql-statement ::= COMMIT [TRANSACTION [name ] ] sql-statement ::= ROLLBACK [TRANSACTION [name ] ] 1. 2. 3. 4. 5. 6. 7. 8. 从2.0版开始,SQLite...
阅读源码可以发现,SQLiteStatement和SQLiteQuery都会根据自己要执行的sql语句提前判断这个是不是readOnly的,只有非readOnly的才需要primary connection,若nonPrimaryConnecion拿不到,也会尝试获取primary connection。 跟踪源码可以发现android封装了SQLiteConnectionPool,primary connection有且仅有一个,noPrimaryConnection可以有多个。
.testcase NAMEBegin redirecting output to 'testcase-out.txt' .testctrl CMD ...Run various sqlite3_test_control() operations .timeout MS尝试打开锁定的表 MS 毫秒 .timer on|off开启或关闭SQL定时器 .trace ?OPTIONS?Output each SQL statement as it is run .vfsinfo ?AUX?Information about the to...
SELECT statement...; SQLite CREATE VIRTUAL TABLE 语句: CREATE VIRTUAL TABLE database_name.table_name USING weblog( access.log ); or CREATE VIRTUAL TABLE database_name.table_name USING fts3( ); SQLite COMMIT TRANSACTION 语句: COMMIT; SQLite...
(db));return -1;} /* Execute SQL statement */ rc = sqlite3_exec(db, sql, NULL, 0, &errmsg);if (rc != SQLITE_OK) {fprintf(stderr, "SQL error: %s\n", errmsg);sqlite3_free(errmsg);} else {fprintf(stdout, "Table created successfully\n");}while ( 1 ){printf("***\n");...
.testcase NAME Begin redirecting output to 'testcase-out.txt' .testctrl CMD ... Run various sqlite3_test_control() operations .timeout MS 尝试打开锁定的表 MS 毫秒 .timer on|off 开启或关闭SQL定时器 .trace ?OPTIONS? Output each SQL statement as it is run .vfsinfo ?AUX? Information abou...
SQLiteLint 会以抽样的时机去检测这个问题,比如每 50 条执行语句,分析一次执行序列,如果发现连续执行次数超过一定阈值的相同的(当然实参可以不同)而未使用 prepared statement 的 sql 语句,就报问题,建议使用 prepared statement 优化。 如阈值是 3 ,那么连续执行下面的语句,就会报问题: ...
/* Finalize the statement. If an SQLITE_SCHEMA error has ** occured, then the above call to sqlite3_step() will have ** returned SQLITE_ERROR. sqlite3_finalize() will return ** SQLITE_SCHEMA. In this case the loop will execute again. ...
SQLite只支持FOR EACH ROW Trigger, 不支持For each statement trigger. 所以不用明确指定for each row trigger. for each row trigger的意思是: 操作语句每修改一行, 就触发一次, 比如删除10行数据变触发10次. for each statement trigger的意思是: 一条操作语句只触发一次. 如果有WHERE子句, 则只针对WHERE子句...